UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY
   
Investment Company Act file number:      
     811-21181
 
 
BlackRock Municipal 2020 Term Trust

(Exact name of registrant as specified in charter)
   
100 Bellevue Parkway, Wilmington, DE 
19809 


(Address of principal executive offices) 
(Zip code) 

Robert S. Kapito, President
BlackRock Municipal 2020 Term Trust
40 East 52nd Street, New York, NY 10022
(Name and address of agent for service)
     
Registrant's telephone number, including area code:        888-825-2257
   
Date of fiscal year end:         December 31, 2005 
 
Date of reporting period:      September 30, 2005
 


Item 1. Schedule of Investments.

The Registrant’s unaudited schedule of investments as of the close of the reporting period pursuant to Rule 30b1-5 under the Investment Company Act of 1940 is as follows:

PORTFOLIO OF INVESTMENTS
SEPTEMBER 30, 2005

BlackRock Municipal 2020 Term Trust (BKK)

      Principal     Option Call    
    Rating1   Amount     Provisions2    
   
(unaudited)
 
(000)
 
Description
(unaudited)
Value
 

          LONG-TERM INVESTMENTS—151.6%      
            California—25.9%      
    A   $12,000   California, GO, 5.00%, 11/01/22 11/13 @ 100   $ 12,592,440  
            Foothill/Eastern Trans. Corridor Agcy.,      
    BBB   10,000       Cap. Apprec., Zero Coupon, 1/15/22 01/10 @ 50.177   3,897,400  
    BBB   12,500       Toll Rd. Rev., Zero Coupon, 1/15/21 01/10 @ 53.346   5,178,125  
            Golden St. Tobacco Sec. Corp.,      
    BBB   3,000       Ser. A-1, 6.625%, 6/01/40 06/13 @ 100   3,411,270  
    BBB   12,010       Ser. A-1, 6.75%, 6/01/39 06/13 @ 100   13,794,806  
    BBB   975       Ser. A-3, 7.875%, 6/01/42 06/13 @ 100   1,222,942  
    BBB   1,470       Ser. A-5, 7.875%, 6/01/42 06/13 @ 100   1,843,821  
    AAA   20,000 3          Ser. B, 5.375%, 6/01/10 N/A   21,839,600  
    B-   3,035   Los Angeles Regl. Arpt. Impvt. Corp. Lease Rev., Amer. Airlines, Inc. Proj.,      
                Ser. C, 7.50%, 12/01/24 12/12 @ 102   3,003,224  
    BBB+   7,000   Poll. Ctrl. Fin. Auth. Sld. Wst. Disp. Rev., Republic Svcs., Inc. Proj.,      
                Ser. C, 5.25%, 6/01/23 No Opt. Call   7,426,300  
    AAA   6,865   Riverside Cnty., Riverside Cnty. Hosp. Proj., Zero Coupon, 6/01/25, MBIA No Opt. Call   2,605,611  
    BBB+   3,355   Statewide Cmnty., Daughters of Charity Hlth. Proj., 5.25%, 7/01/25 07/15 @ 100   3,479,034  

                  80,294,573  

            Colorado—0.7%      
    AAA   4,500   E-470 Pub. Hwy. Auth. Cap. Apprec., Ser. B, Zero Coupon, 9/01/22, MBIA No Opt. Call   2,034,900  

            District of Columbia—5.3%      
            Friendship Pub. Charter Sch., Inc. Proj.,      
    A   3,320       5.00%, 6/01/23, ACA 06/14 @ 100   3,361,666  
    A   2,680       5.75%, 6/01/18, ACA 06/14 @ 100   2,897,831  
    AAA   5,000 4 Met. Washington Arpts. Auth. Arpt. Sys. Rev., Ser. C-2, 5.00%, 10/01/24, FSA 10/14 @ 100   5,183,150  
    BBB   4,215   Tobacco Settlement Fin. Corp., 6.50%, 5/15/33 No Opt. Call   4,938,631  

                  16,381,278  

            Florida—16.1%      
    NR   4,860   Bellago Edl. Facs. Benefit Dist., Ser. A, 5.85%, 5/01/22 05/14 @ 100   4,989,422  
    Baa1   1,500   Cap. Trust Agcy. Multi-Fam. Hsg., American Oppty. Proj., Ser. A, 5.75%, 6/01/23 06/13 @ 102   1,480,245  
    NR   3,000   CFM Cmnty. Dev. Dist. Cap. Impvt., Ser. B, 5.875%, 5/01/14 No Opt. Call   3,091,200  
    NR   4,445   Grand Hampton Cmnty. Dev. Dist. Cap. Impvt., 6.10%, 5/01/24 05/13 @ 101   4,549,857  
    NR   4,140   Habitat Cmnty. Dev. Dist., 5.80%, 5/01/25 05/14 @ 101   4,156,643  
    BB+   5,475   Miami Beach Hlth. Facs. Auth., Mt. Sinai Med. Ctr. Proj., 6.75%, 11/15/21 11/14 @ 100   6,142,457  
    NR   4,690   Middle Vlg. Cmnty. Dev. Dist., Ser. A, 5.80%, 5/01/22 05/13 @ 100   4,843,457  
    NR   1,000   Pine Islands Cmnty. Dev. Dist. Util. Sys. Rev., 5.30%, 11/01/10 No Opt. Call   999,220  
    NR   7,680   Stevens Plantation Cmnty. Dist. Spl. Assmt. Rev., Ser. B, 6.375%, 5/01/13 No Opt. Call   7,911,322  
    NR   3,854   Vlg. Cmnty. Dev. Dist. Spl. Assmt. Rev. No. 5, Ser. A, 6.00%, 5/01/22 05/13 @ 101   4,030,821  
    NR   6,000   Westchester Cmnty. Dev. Dist. No. 1 Spl. Assmt., 6.00%, 5/01/23 05/13 @ 101   6,263,520  
    NR   1,555   World Commerce Cmnty. Dev. Dist. Spec. Assmt., Ser. A-1, 6.25%, 5/01/22 05/14 @ 101   1,594,979  

                  50,053,143  

            Georgia—1.6%      
    BBB   2,500   Milledgeville Baldwin Cnty. Dev. Auth., Georgia Coll. & St. Univ. Fndtn. Proj.,
    5.50%, 9/01/24
09/14 @ 101   2,595,450  
    BBB   2,350   Richmond Cnty. Dev. Auth. Env. Impvt., 5.75%, 11/01/27 11/13 @ 100   2,464,210  

                  5,059,660  

            Illinois—9.7%      
    NR   2,155   Centerpoint Intermodal Ctr. Prog. Trust, Ser. A, 8.00%, 6/15/23 No Opt. Call   2,190,213  
    A-   5,000   Dev. Fin. Auth. Depaul Univ. Proj., Ser. C, 5.25%, 10/01/24 10/14 @ 100   5,328,000  
    AA+   4,800   Edl. Fac. Auth., Northwestern Univ. Proj., 5.00%, 12/01/21 12/13 @ 100   5,083,008  
            Fin. Auth. Student Hsg., MJH Ed. Asst. Living Proj.,      
    Baa2   2,725       Ser. A, 5.00%, 6/01/24 06/14 @ 100   2,730,504  
    Baa2   3,250       Ser. A, 5.50%, 6/01/19 06/14 @ 100   3,432,942  
    Baa3   1,075       Ser. B, 5.00%, 6/01/24 06/14 @ 100   1,064,003  
    AAA   8,265   Lake Cnty. Cmnty. Con. Sch. Dist., No. 73 Hawthorn Proj.,      
                Zero Coupon, 12/01/22, MBIA No Opt. Call   3,756,277  
    AAA   13,455   Met. Pier & Expo. Auth. Ded. St. Tax Rev., McCormick Place Expansion Proj.,      
                Ser. A, Zero Coupon, 6/15/22, MBIA No Opt. Call   6,348,742  

                  29,933,689  

1


BlackRock Municipal 2020 Term Trust (BKK) (continued)

      Principal           Option Call    
    Rating1   Amount           Provisions2    
   
(unaudited)
 
(000)
Description
      (unaudited)   Value  

          Indiana—5.0%     
    BBB   $ 10,000   Indianapolis Arpt. Auth., FedEx Corp. Proj., 5.10%, 1/15/17       No Opt. Call   $ 10,355,200  
    NR   5,290   Vincennes Econ. Dev., Southwest Indiana Regl. Youth Proj., 6.25%, 1/01/24       01/09 @ 102   5,290,159  

                        15,645,359  

            Kansas—1.0%            
    AAA   6,440   Wyandotte Cnty. Unified Gov’t. Spl. Oblig., Intl. Speedway Proj., Zero Coupon,            
                12/01/20, MBIA       No Opt. Call   3,203,964  

            Kentucky—1.3%            
    BBB   3,750   Maysville Sld. Wst. Disp. ,Inland Container Corp. Proj., 6.90%, 9/01/22       09/13 @ 102   4,178,550  

            Louisiana—0.7%            
    BBB   2,000   De Soto Parish Env. Impvt. Rev., Ser. A, 5.85%, 11/01/27       11/13 @ 100   2,092,760  

            Maryland—5.6%            
            Frederick Cnty., Urbana Cmnty. Dev. Auth. Proj.,            
    NR   3,000       6.625%, 7/01/25       07/07 @ 102   3,119,220  
    NR   5,171       5.80%, 7/01/20       07/07 @ 102   5,218,832  
    Baa1   8,500   Hlth. & Higher Edl. Facs. Auth. Medstar Hlth. Proj., 5.375%, 8/15/24       08/14 @ 100   8,942,850  

                        17,280,902  

            Massachusetts—3.3%            
    AAA   5,000   Bay Transp. Auth. Sales Tax Rev., Ser. A, 5.00%, 7/01/24       No Opt. Call   5,494,450  
    BBB   4,500   Dev. Fin. Agcy. Sld. Wst. Disp. Rev., Wst. Mgmt., Inc. Proj., 5.45%, 6/01/14       No Opt. Call   4,798,800  

                        10,293,250  

            Michigan—1.7%            
    BB+   5,000   Midland Cnty. Econ. Dev., Ser. A, 6.875%, 7/23/09       07/07 @ 101   5,226,200  

            Minnesota—0.4%            
    A2   1,250   Higher Ed. Facs. Auth., Univ. of St. Thomas Proj., Ser. 5, 5.00%, 10/01/24       10/14 @ 100   1,304,237  

            Mississippi—1.0%            
    BBB   3,000   Warren Cnty. Env. Impvt., Intl. Paper Proj., Ser. A, 5.85%, 11/01/27       11/13 @ 100   3,093,180  

            Missouri—3.6%            
    BBB+   5,000   Dev. Fin. Brd., Branson Landing Proj., Ser. A, 5.50%, 12/01/24       06/14 @ 100   5,263,250  
    AA   5,500   Hlth. & Edu. Fac., BJC Hlth. Sys. Proj., Ser. A, 5.00%, 5/15/20       05/15 @ 100   5,804,700  

                        11,067,950  

            Multi-State—6.7%            
            Charter Mac Equity Issuer Trust,            
    A3   1,000 5     Ser. A, 5.75%, 10/31/99       No Opt. Call   1,062,780  
    A3   2,500 5     Ser. A, 6.00%, 4/30/19       No Opt. Call   2,640,400  
    Baa1   4,000 5     Ser. B, 6.00%, 4/30/15       No Opt. Call   4,198,680  
    NR   2,500 5     Ser. B, 6.30%, 4/30/19       No Opt. Call   2,674,500  
            Munimae TE Bond Subsidiary, LLC,            
    Baa2   5,000 5     Ser. C1, 5.80%, 6/30/49       09/14 @ 100   5,071,000  
    Baa2   5,000 5          Ser. C2, 5.80%, 6/30/49       09/14 @ 100   4,995,200  

                        20,642,560  

            New Hampshire—1.7%            
    BBB+   5,000   Hlth., Elliot Hosp. Proj., Ser. B, 5.60%, 10/01/22       10/13 @ 100   5,283,200  

            New Jersey—12.8%            
            Econ. Dev. Auth.,            
    BBB   11,500       Cigarette Tax, 5.50%, 6/15/24       06/12 @ 100   12,061,775  
    B   10,000       Continental Airlines, Inc. Proj., 7.00%, 11/15/30       11/10 @ 101   8,582,800  
    B   1,500       Continental Airlines, Inc. Proj., 9.00%, 6/01/33       06/13 @ 101   1,573,920  
    BBB-   1,000       First Mtg. Winchester Proj., Ser. A, 4.80%, 11/01/13       No Opt. Call   1,012,170  
    Baa3   7,500       Kapkowski Rd. Landfill Proj., 6.50%, 4/01/31       No Opt. Call   8,552,400  
    Baa1   4,000   Hlth. Care Fac. Fin. Auth., Cap. Hlth. Sys. Oblig. Grp. Proj., Ser. A, 5.75%, 7/01/23       07/13 @ 100   4,307,160  
            Middlesex Cnty. Impvt. Auth.,            
    NR   2,500       Heldrich Ctr. Hotel Proj., Ser. B, 6.125%, 1/01/25       01/15 @ 100   2,497,825  
    Baa1   1,000       Str. Student Hsg. Proj., Ser. A, 5.00%, 8/15/23       08/14 @ 100   1,017,850  

                        39,605,900  

            New Mexico—0.8%            
    NR   2,520   Sandoval Cnty. Proj. Dev., Santa Ana Pueblo Proj., 7.75%, 7/01/15       No Opt. Call   2,600,464  

2


BlackRock Municipal 2020 Term Trust (BKK) (continued)

      Principal     Option Call    
    Rating1   Amount     Provisions2    
   
(unaudited)
  (000)   Description (unaudited)   Value  

          Ohio—5.5%      
    Aa3   $13,000   Cuyahoga Cnty. Cleveland Clinic Hlth. Sys. Proj., 6.00%, 1/01/19-1/01/20 07/13 @ 100   $ 14,705,020  
    NR   1,100   Pinnacle Cmnty. Infrastructure Fin. Auth. Facs. Rev., Ser. A, 6.00%, 12/01/22 12/14 @ 101   1,149,104  
    NR   1,215   Port of Greater Cincinnati Dev. Auth., Coop. Pub. Pkg. Infrastructure Proj.,
    6.30%, 2/15/24
02/14 @ 102   1,290,816  

                  17,144,940  

            Oklahoma—1.1%      
    B-   3,350   Tulsa Mun. Arpt. Trust, Ser. A, 7.75%, 6/01/35 No Opt. Call   3,362,864  

            Pennsylvania—6.2%      
    BBB+   6,680   Higher Edl. Fac., La Salle Univ. Proj., 5.50%, 5/01/26 05/13 @ 100   7,095,630  
    A   10,000   Lancaster Cnty. Hosp. Auth., Gen. Hosp. Proj., 5.75%, 3/15/20 09/13 @ 100   10,882,600  
    NR   1,275   Montgomery Cnty. Indl. Dev. Auth., Whitemarsh Continuing Care Proj., 6.00%, 2/01/21 02/15 @ 100   1,339,566  

                  19,317,796  

            Puerto Rico—11.6%      
    A-   10,900   Elec. Pwr. Auth., Ser. NN, 5.125%, 7/01/24 07/13 @ 100   11,463,966  
    BBB   23,000   Pub. Impvt., Ser. A, 5.25%, 7/01/22-7/01/24 07/13 @ 100   24,397,550  

                  35,861,516  

            Rhode Island—1.5%      
    BBB   4,500   Hlth. & Edl. Bldg. Corp. Hosp. Fin., Ser. A, 5.875%, 9/15/23 09/08 @ 100   4,620,015  

            Texas—6.9%      
    B2   5,000 6      Affordable Hsg. Corp. Multi-Fam. Hsg. Rev., Arborstone/Baybrook Oaks Proj.,      
                Ser. A, 5.85%, 11/01/31 11/11 @ 102   3,785,950  
    BBB   1,100   Brazos River Auth., PCR, TXU Energy Co. LLC Proj., Ser. A, 6.75%, 4/01/38 No Opt. Call   1,236,741  
    BBB-   3,500   Port Corpus Christi Indl. Dev. Corp., Valero Proj., Ser. C, 5.40%, 4/01/18 04/08 @ 102   3,625,195  
    AAA   16,440   Tpke. Auth., Central Texas Tpke. Sys. Proj., Ser. A, Zero Coupon,
    8/15/21-8/15/24, AMBAC
No Opt. Call   7,402,531  
            Weatherford Indpt. Sch. Dist.,      
    AAA   6,945       Zero Coupon, 2/15/23 02/11 @ 50.236   2,784,667  
    AAA   6,945       Zero Coupon, 2/15/24 02/11 @ 47.435   2,617,015  

                  21,452,099  

            Trust Territories—1.3%      
    A-   4,000 5 San Manuel Entertainment Auth., 2004 Gaming Proj., Ser.C, 4.50%, 12/01/16 12/13 @ 102   3,982,840  

            U.S. Virgin Islands—0.3%      
    BBB   1,000   Pub. Fin. Auth. Sen. Lien Matching Fund Loan, Ser. A, 5.25%, 10/01/17 10/14 @ 100   1,070,970  

            Virginia—7.7%      
    NR   5,000   Celebrate North Cmnty. Dev. Auth. Spl. Assmt. Rev., Ser. B, 6.60%, 3/01/25 03/14 @ 102   5,169,850  
    BBB   10,000   Charles City Cnty. Econ. Dev. Auth. Sld. Wst. Disp., 5.125%, 8/01/27 05/14 @ 100   10,222,000  
    A3   7,500   Mecklenburg Cnty. Ind. Dev. Auth., Exempt FAC-UAE LP Proj., 6.50%, 10/15/17 10/12 @ 100   8,342,550  

                  23,734,400  

            Washington—2.5%      
    AAA   10,000   Washington, Ser. S-5, Zero Coupon, 1/01/19, FGIC No Opt. Call   5,512,200  
    AAA   4,630   Washington Mtr. Veh. Proj., Ser. F, Zero Coupon, 12/01/21, MBIA No Opt. Call   2,189,342  

                  7,701,542  

            Wisconsin—2.1%      
            Hlth. & Ed. Fac. Auth., Wheaton Franciscan Svcs. Proj.,      
    A   2,880       5.50%, 8/15/17 08/13 @ 100   3,102,336  
    A   3,190       5.50%, 8/15/18 08/13 @ 100   3,418,691  

                  6,521,027  

            Total Long-Term Investments (cost $446,739,338)     470,045,728  

             
            SHORT-TERM INVESTMENTS—3.6%      
            Massachusetts—0.1%      
    A-1+   350 7 Dev. Fin. Agcy., Boston Univ. Proj., Ser. R-4, 2.30%, 10/03/05, XLCA, FRDD N/A   350,000  

            New York—0.4%      
    A-1+   1,000 7 Triborough Brdg. & Tunl. Auth., GO, 2.78%, 10/06/05, FRWD N/A   1,000,000  

            North Dakota—1.7%      
    VMIG1   5,250 7 Grand Forks Hosp. Fac. Rev., United Hosp. Oblig. Grp. Proj., 2.38%, 10/03/05, FRDD N/A   5,250,000  

3


BlackRock Municipal 2020 Term Trust (BKK) (continued)

      Shares                
        (000)   Description           Value  

          Money Market Fund—1.4%            
        4,400       AIM Tax Free Investment Co. Cash Reserve Portfolio           $ 4,400,000  

            Total Short-Term Investments (cost $446,739,338)           11,000,000  

            Total Investments—155.2% (cost $457,739,3388)           $ 481,045,728  
            Other assets in excess of liabilities—2.1%           6,620,648  
            Preferred shares at redemption value, including dividends payable—(57.3)%           (177,644,455)  

            Net Assets Applicable to Common Shareholders—100%           $ 310,021,921  

 


1   Using the higher of S&P’s, Moody’s or Fitch’s rating.  
2   Date (month/year) and price of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates.  
3   This bond is prerefunded. U.S. government securities, held in escrow, are used to pay interest on this security, as well as retire the bond in full at the date indicated, typically at a premium to par.  
4   Security, or a portion thereof, pledged as collateral with a value of $2,123,260 on 615 short U.S. Treasury Note futures contracts expiring December 2005 and 222 short U.S. Treasury Bond futures contracts expiring December 2005. The value of such contracts on September 30, 2005 was $93,000,141, with an unrealized gain of $1,385,448.  
5   Security is not registered under the Securities Act of 1933. These securities may be resold in transactions in accordance with Rule 144A under that Act, to qualified institutional buyers. As of September 30, 2005, the Trust held 7.9% of its net assets, with a current market value of $24,625,400, in securities restricted as to resale.  
6   Illiquid security representing 1.22% of net assets.  
7   For purposes of amortized cost valuation, the maturity date of this instrument is considered to be the earlier of the next date on which the security can be redeemed at par, or the next date on which the rate of interest is adjusted. Rate shown is rate as of September 30, 2005.  
8   Cost for Federal tax purposes is $457,715,845. The net unrealized appreciation on a tax basis is $23,329,883, consisting of $25,248,464 gross unrealized appreciation and $1,918,581 unrealized depreciation.  
 

 


KEY TO ABBREVIATIONS
                       
ACA     American Capital Access   FSA     Financial Security Assurance  
AMBAC     American Municipal Bond Assurance Corp.   GO     General Obligation  
FGIC     Financial Guaranty Insurance Co.   MBIA     Municipal Bond Insurance Assoc.  
FRDD     Floating Rate Daily Demand   PCR     Pollution Control Revenue  
FRWD     Floating Rate Weekly Demand   XLCA     XL Capital Assurance  

See Notes to Financial Statements.

4


Item 2. Controls and Procedures.

(a) The Registrant's principal executive and principal financial officers have evaluated the Registrant's disclosure controls and procedures within 90 days of this filing and have concluded, as of that date, that the Registrant’s disclosure controls and procedures were reasonably designed to ensure that information required to be disclosed by the Registrant in this Form N-Q was recorded, processed, summarized, and reported within the required time periods and that information to be disclosed by the Registrant in this Form N-Q was accumulated and communicated to the Registrant’s management , including it principle executive and principle financial officers, as appropriate to allow timely decisions regarding required disclosure.

(b) There were no changes in the Registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a -3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Registrant's internal control over financial reporting.

Item 3. Exhibits.

Separate certifications of the registrant’s principal executive and financial officers pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 are attached as EX-99.CERT.


SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant)     BlackRock Municipal 2020 Term Trust     

By:      /s/ Henry Gabbay                                                                                                     
Name: Henry Gabbay
Title: Treasurer
Date: November 18, 2005

      Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

By:      /s/ Robert S. Kapito                                                                                                 
Name: Robert S. Kapito
Title: Principal Executive Officer
Date: November 18, 2005

By:      /s/ Henry Gabbay                                                                                                     

Name: Henry Gabbay
Title: Principal Financial Officer
Date: November 18, 2005