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:           811-07664          

          BlackRock California Investment Quality Municipal Trust, Inc.          
(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 California Investment Quality Municipal Trust, Inc.
                                        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:          October 31, 2006
Date of reporting period:         January 31, 2006

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
JANUARY 31, 2006 (
unaudited)


BlackRock California Investment Quality Municipal Trust (RAA)

     
Principal
             
     
Amount
        Option Call    
    Rating1  
(000)
   
Description
  Provisions2  
Value
 

            LONG-TERM INVESTMENTS—131.1        
              California—113.3%        
    A   $   40     California, GO, 5.75%, 3/01/19   09/06 @ 100.50  
$
40,276  
    A+   595     Chula Vista Indl. Dev. Rev., 5.00%, 12/01/27   12/15 @ 102   602,384  
              Edl. Facs. Auth.,        
    AAA   760 3      Santa Clara Univ. Proj., 5.00%, 9/01/06, MBIA   N/A   783,340  
    AAA   240        Student Loan Prog., Ser. A, 6.00%, 3/01/16, MBIA   03/07 @ 102   249,060  
              Golden St. Tobacco Sec. Corp.,        
    A-   1,040        Ser. A, 5.00%, 6/01/45   06/15 @ 100   1,050,223  
    AAA   600 3      Ser. B, 5.50%, 6/01/13   N/A   667,104  
    AAA   400 3      Ser. B, 5.625%, 6/01/13   N/A   447,916  
    A3   1,040     Hlth. Facs. Fin. Auth. Rev., Cedars Sinai Med. Ctr. Proj., 5.00%, 11/15/34   11/15 @ 100   1,051,149  
    AAA   1,000 3   Los Angeles Cnty. Met. Trans. Auth. Sales Tax Rev., 6.00%, 7/01/06, MBIA   N/A   1,022,000  
    AAA   1,000     Los Angeles Cnty., Cmnty. Facs. Spec. Tax, Ser. A, 5.50%, 9/01/14, FSA   09/07 @ 102   1,054,590  
    AAA   500     Los Angeles Dept. of Wtr. & Pwr. Sys., 5.00%, 7/01/35, FSA   07/15 @ 100   521,720  
    AA   1,150     Los Angeles Harbor Dept., Ser. B, 6.00%, 8/01/13   08/06 @ 101   1,177,278  
    B-   945     Los Angeles Regl. Arpt. Impvt., Corp. Lease Rev., Amer. Airlines, Inc. Proj.,        
               Ser. B, 7.50%, 12/01/24   12/12 @ 102   976,998  
    NR   1,000     Poway Unified Sch. Dist., Spl. Tax Rev., Cmnty. Facs. Dist. No. 6 Proj., 5.60%, 9/01/33   09/10 @ 102   1,018,550  
    A2   1,000     Pub. Wks. Brd., Lease Rev., St. Univ. Proj., Ser. A, 6.10%, 10/01/06   03/06 @ 101   1,012,870  
    BBB+   1,000 3   Sacramento Pwr. Auth., Cogeneration Proj., 6.50%, 7/01/06   N/A   1,033,690  
    NR   1,000     San Bernardino Cnty., Spl. Tax Rev., Cmnty. Facs., 5.90%, 9/01/33   09/12 @ 102   1,058,180  
    AAA   500     San Diego Ind. Dev., Ser. A, 5.90%, 6/01/18, AMBAC   03/06 @ 100   500,745  
    AAA   150     San Francisco City & Cnty. Arpt. Rev. Comm., Intl. Arpt., Ser. 12-A, 5.90%, 5/01/26, MBIA   05/06 @ 101   152,452  
    AAA   40     So. California Pub. Pwr. Auth., Transm. Proj. Rev., 5.50%, 7/01/20, MBIA   03/06 @ 100   40,053  
    AAA   500     Temecula Valley Unified Sch. Dist. Proj., GO, Ser. G, 5.75%, 8/01/25, FGIC   08/07 @ 102   526,865  
    BBB   900     Tobacco Sec. Auth. So. California, Tobacco Settlement Rev., Ser. A, 5.625%, 6/01/43   06/12 @ 100   922,131  
    AAA   370     West Basin Mun. Wtr. Dist., COP, Ser. A, 5.50%, 8/01/22, AMBAC   08/07 @ 101   385,022  

                      16,294,596  

              Puerto Rico—17.8%        
              Hwy. & Trans. Auth.,        
    BBB+   130        5.00%, 7/01/30   07/15 @ 100   132,043  
    BBB+   260        5.00%, 7/01/40   07/15 @ 100   262,517  
    BBB+   250        5.00%, 7/01/45   07/15 @ 100   252,420  
    BBB+   230        Ser. K, 5.00%, 7/01/35   07/15 @ 100   232,226  
    AAA   85        Ser. L, 5.25%, 7/01/38, AMBAC   No Opt. Call   96,608  
              Pub. Fin. Corp.,        
    Aaa   745 3      Ser. E, 5.50%, 2/01/12   N/A   816,088  
    BBB-   255        Ser. E, 5.50%, 8/01/29   02/12 @ 100   268,403  
    BBB   500     Pub. Impvt., Ser. A, 5.00%, 7/01/34   07/14 @ 100   504,420  

                      2,564,725  

              Total Long-Term Investments (cost $18,020,126)       18,859,321  

              SHORT-TERM INVESTMENTS—18.9%        
              California—14.7%        
    A-1+   600 4   Dept. of Wtr. Res., Pwr. Sply. Rev., Ser. B-2, 3.12%, 2/01/06, FRDD   N/A   600,000  
    A-1+   600 4   Hlth. Facs Fin. Auth., Ser. B, 2.84%, 2/01/06, AMBAC, FRDD   N/A   600,000  
    VMIG1   318 4   Irvine Impvt. Bond Act 1915, Spec. Assmt. Dist. No 00-18, Ser. A, 3.08%, 2/01/06, FRDD   N/A   318,000  
    A-1+   600 4   Orange Cnty. San. Dist., Ser. B, 3.03%, 2/01/06, FRDD   N/A   600,000  

                      2,118,000  

1



BlackRock California Investment Quality Municipal Trust (RAA) (continued)

     
Principal
             
     
Amount
        Option Call    
    Rating1  
(000)
   
Description
  Provisions2  
Value
 


            Puerto Rico—4.2%        
    A-1  
$6004
    Hwy. & Transp. Auth. Transp. Rev., Ser. A, 2.93%, 2/01/06, AMBAC, FRWD       $ 600,000  

              Total Short-Term Investments (cost $2,718,000)       2,718,000  

              Total Investments—150.0% (cost $20,738,1265)       $21,577,321  
              Other assets in excess of liabilities—2.2%       313,624  
              Preferred shares at redemption value, including dividends payable—(52.2)%       (7,503,565 )

              Net Assets Applicable to Common Shareholders—100%       $14,387,380  

 

   
1  Using the higher of Standard & Poor’s, Moody’s Investors Service or Fitch ratings.  
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    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 January 31, 2006.  
5 Cost for Federal income tax purposes is $20,733,689. The net unrealized appreciation on a tax basis is $843,632, consisting of $900,348 gross unrealized appreciation and $56,716  gross unrealized depreciation.  
     


KEY TO ABBREVIATIONS
AMBAC   American Municipal Bond Assurance Corp.   FRWD Floating Rate Weekly Demand  
COP   Certificate of Participation   FSA Financial Security Assurance  
FGIC   Financial Guaranty Insurance Co.   GO General Obligation  
FRDD   Floating Rate Daily Demand   MBIA Municipal Bond Insurance Assoc.


2


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 its principal executive and principal 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 California Investment Quality Municipal Trust, Inc.     

By:      /s/ Henry Gabbay                                                                      
Name: Henry Gabbay
Title: Treasurer and Principal Financial Officer
Date: March 31, 2006

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: President and Principal Executive Officer
Date: March 31, 2006

By:      /s/ Henry Gabbay                                                                      
Name: Henry Gabbay
Title: Treasurer and Principal Financial Officer
Date: March 31, 2006