- Quarterly Schedule of Portfolio Holdings of Registered Management Investment Company (N-Q)

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

Name of Fund: BlackRock California Investment Quality Municipal Trust, Inc. (RAA)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock California Investment Quality Municipal Trust, Inc., 55 East 52 ^nd Street, New York, NY 10055.

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 07/31/2010

Date of reporting period: 04/30/2010

Item 1 – Schedule of Investments




Schedule of Investments April 30, 2010 (Unaudited)	BlackRock California Investment Quality Municipal
	Trust, Inc. (RAA)
	(Percentages shown are based on Net Assets)


Municipal Bonds	Par (000)		Value

California — 132.5%

County/City/Special District/School District — 41.3 %
Butte-Glenn Community College District, GO, Election 2002, Series C, 5.50%, 8/01/30	$	500	$	544,175
County of Kern California, COP, Capital Improvements Projects, Series A (AGC), 6.00%, 8/01/35		500		554,490
Los Alamitos Unified School District California, GO, School Facilities Improvement District No. 1, 5.50%, 8/01/33		500		534,690
Los Angeles Municipal Improvement Corp., RB, Real Property, Series E, 5.75%, 9/01/34		410		435,830
Marysville Joint Unified School District California, GO, Election of 2006 (AGM), 5.50%, 8/01/32		95		100,598
Modesto Irrigation District, COP, Capital Improvements, Series A, 5.50%, 10/01/26		65		70,225
Rio Hondo Community College District California, GO, Election of 2009, Series B, 5.50%, 8/01/30		500		536,680
San Diego Regional Building Authority California, RB, County Operations Center & Annex, Series A, 5.38%, 2/01/36		500		528,365
San Francisco Bay Area Rapid Transit District, GO, Election of 2004, Series B, 5.00%, 8/01/35		150		157,809
San Jose Unified School District Santa Clara County California, GO, Election of 2002, Series D, 5.00%, 8/01/32		250		256,095
Santa Ana Unified School District, GO, Election of 2008, Series A, 5.13%, 8/01/33		150		155,034
Santa Cruz County Redevelopment Agency California, Tax Allocation Bonds, Live Oak/Soquel Community Improvement, Series A, 7.00%, 9/01/36		100		110,906
Snowline Joint Unified School District, COP, Refunding, Refining Project (AGC), 5.75%, 9/01/38		250		276,403

Municipal Bonds	Par (000)		Value

California (continued)

County/City/Special District/School District (concluded)
Vacaville Unified School District California, GO, Election of 2001 (NPFGC), 5.00%, 8/01/30	$	500	$	502,715
West Contra Costa Unified School District, GO, Election of 2005, Series B (BHAC), 5.63%, 8/01/35		335		361,676
Westminster Redevelopment Agency California, Tax Allocation Bonds, Subordinate, Commercial Redevelopment Project No. 1 (AGC), 6.25%, 11/01/39		500		569,835

				5,695,526

Education — 9.2%
California Educational Facilities Authority, RB, Stanford University, Series Q, 5.25%, 12/01/32		500		518,400
University of California, RB:
Limited Project, Series D (NPFGC), 5.00%, 5/15/37		500		505,905
Series O, 5.75%, 5/15/29		210		237,991

				1,262,296

Health — 20.3%
ABAG Finance Authority for Nonprofit Corps, Refunding RB, Sharp Healthcare:
6.38%, 8/01/34		250		263,390
6.25%, 8/01/39		250		272,708
California Health Facilities Financing Authority, Refunding RB:
Catholic Healthcare West, Series A, 6.00%, 7/01/29		510		549,826
Catholic Healthcare West, Series A, 6.00%, 7/01/39		350		375,196
Providence Health & Services, Series C, 6.50%, 10/01/38		250		282,465
St. Joseph Health System, Series A, 5.75%, 7/01/39		535		556,202
California Statewide Communities Development Authority, Refunding RB, Catholic Healthcare West:
Series E, 5.50%, 7/01/31		250		256,830
Series K (AGC), 5.50%, 7/01/41		240		245,686

				2,802,303

Portfolio Abbreviations

To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of many of the securities have been abbreviated according to the following list:


AGC	Assured Guaranty Corp.
AGM	Assured Guaranty Municipal Corp.
AMBAC	American Municipal Bond Assurance Corp.
AMT	Alternative Minimum Tax (subject to)
BHAC	Berkshire Hathaway Assurance Corp.
COP	Certificates of Participation
GO	General Obligation Bonds
LRB	Lease Revenue Bonds
NPFGC	National Public Finance Guarantee Corp.
RB	Revenue Bonds



BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST, INC.	APRIL 30, 2010	1




Schedule of Investments (continued)	BlackRock California Investment Quality Municipal
	Trust, Inc. (RAA)
	(Percentages shown are based on Net Assets)


Municipal Bonds	Par (000)		Value

California (continued)

State — 11.6%
California State Public Works Board, RB:
Department of Education, Riverside Campus Project, Series B, 6.50%, 4/01/34	$	340	$	366,180
Various Capital Projects, Sub-Series I-1, 6.38%, 11/01/34		250		267,838
California State University, Refunding RB, Systemwide, Series C (NPFGC), 5.00%, 11/01/38		400		402,868
State of California, GO, Various Purpose, 6.50%, 4/01/33		490		555,547

				1,592,433

Transportation — 10.3%
County of Orange California, RB, Series B, 5.75%, 7/01/34		500		543,165
County of Sacramento California, RB, Senior Series B:
5.75%, 7/01/39		250		268,848
(AGC), 5.50%, 7/01/34		105		110,928
Port of Oakland, RB, Series K, AMT (NPFGC), 5.75%, 11/01/29		495		494,970

				1,417,911

Utilities — 39.8%
California Infrastructure & Economic Development Bank, RB, California Independent System Operator, Series A, 6.25%, 2/01/39		400		422,784
California State Department of Water Resources, Refunding RB, Central Valley Project, Series AE, 5.00%, 12/01/28		25		26,927
Chino Basin Regional Financing Authority California, RB, Inland Empire Utilities Agency, Series A (AMBAC), 5.00%, 11/01/33		200		200,994
City of Bakersfield California, RB, Series A (AGM), 5.00%, 9/15/32		350		357,119
City of Los Angeles California, Refunding RB, Series A, 5.75%, 6/01/34		35		38,838
Contra Costa Water District, Refunding RB, Series O (AMBAC), 5.00%, 10/01/24		600		639,162
East Bay Municipal Utility District, RB, Sub-Series A:
(AGM), 5.00%, 6/01/32		235		247,441
(NPFGC), 5.00%, 6/01/35		250		258,602
Eastern Municipal Water District California, COP:
Series A (NPFGC), 5.00%, 7/01/32		100		102,499
Series H, 5.00%, 7/01/35		300		308,487
Los Angeles Department of Water & Power, RB, Power System, Sub-Series A-1 (AGM), 5.00%, 7/01/35		500		512,310

Municipal Bonds	Par (000)		Value

California (concluded)

Utilities (concluded)
Metropolitan Water District of Southern California, RB, Series A:
5.00%, 1/01/27	$	40	$	43,732
5.00%, 7/01/37		575		600,656
San Diego County Water Authority, COP, Series A (AGM), 5.00%, 5/01/31		405		414,161
Sacramento Area Flood Control Agency, Special Assessment Bonds, Consolidated Capital Assessment District (BHAC), 5.50%, 10/01/28		75		83,085
Sacramento Municipal Utility District, Refunding RB, Series U (AGM), 5.00%, 8/15/27		155		164,489
San Diego County Water Authority, Refunding RB, Series A, 5.00%, 5/01/27		40		42,745
San Diego Public Facilities Financing Authority, Refunding RB:
Senior Series A, 5.25%, 5/15/39		250		263,227
Series A, 5.00%, 8/01/29		100		104,249
Series A, 5.25%, 8/01/38		500		523,120
Series B, 5.13%, 8/01/29		50		53,001
Southern California Public Power Authority, RB:
Southern Transmission Project, Series B, 6.00%, 7/01/27		25		27,991
Transmission Project, (NPFGC), 5.50%, 7/01/20		40		40,151

				5,475,770

Total Municipal Bonds – 132.5%				18,246,239


Municipal Bonds Transferred to Tender Option Bond Trusts (a)

California — 15.8%
County/City/Special District/School District — 11.5 %
Los Angeles Community College District California, GO, Election of 2008, Series A, 6.00%, 8/01/33		480		537,992
San Diego Community College District California, GO, Election of 2002, 5.25%, 8/01/33		508		534,001
Santa Clara County Financing Authority, Refunding LRB, Series L, 5.25%, 5/15/36		495		517,479

				1,589,472

Education - 2.4%
University of California, RB, Series O, 5.75%, 5/15/34		300		336,837



2	BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST, INC.	APRIL 30, 2010




Schedule of Investments (concluded)	BlackRock California Investment Quality Municipal
	Trust, Inc. (RAA)
	(Percentages shown are based on Net Assets)


Municipal Bonds Transferred to Tender Option Bond Trusts (a)	Par (000)		Value

California (concluded)

Utilities — 1.9%
Eastern Municipal Water District, COP, Series H, 5.00%, 7/01/33	$	250	$	256,964

Total Municipal Bonds Transferred to Tender Option Bond Trusts – 15.8%				2,183,273

Total Long-Term Investments (Cost – $19,479,775) – 148.3%				20,429,512




Short-Term Securities	Shares

CMA California Municipal Money Fund, 0.04% (b)(c)		441,806		441,806

Total Short-Term Securities (Cost – $441,806) – 3.2%				441,806

Total Investments (Cost – $19,921,581*) – 151.5%				20,871,318
Other Assets Less Liabilities – 0.4%				60,941
Liability for Trust Certificates, Including Interest Expense and Fees Payable – (8.9)%				(1,233,879	)
Preferred Shares, at Redemption Value – (43.0)%				(5,925,306	)

Net Assets Applicable to Common Shares – 100.0%			$	13,773,074


*	The cost and unrealized appreciation (depreciation) of investments as of April 30, 2010, as computed for federal income tax purposes, were as follows:


Aggregate cost	$	18,713,599

Gross unrealized appreciation	$	962,431
Gross unrealized depreciation		(37,596	)

Net unrealized appreciation	$	924,835


(a)	Securities represent bonds transferred to a tender option bond trust in exchange for which the Trust acquired residual interest certificates. These securities serve as collateral in a financing transaction.

(b)	Investments in companies considered to be an affiliate of the Fund during the period, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows:



Affiliate	Shares Held at July 31, 2009		Net Activity			Shares Held at April 30, 2010		Income

CMA California Municipal Money Fund		1,637,526		(1,195,720	)		441,806	$	143


(c)	Represents the current yield as of report date.

•	Fair Value Measurements - Various inputs are used in determining the fair value of investments, which are as follows:

	•	Level 1 — price quotations in active markets/exchanges for identical assets and liabilities

	•	Level 2 — other observable inputs (including, but not limited to: quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market-corroborated inputs)

	•	Level 3 — unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the Trust’s own assumptions used in determining the fair value of investments)

The inputs or methodologies used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. For information about the Trust’s policy regarding valuation of investments and other significant accounting policies, please refer to the Trust’s most recent financial statements as contained in its semi-annual report.

The following table summarizes the inputs used as of April 30, 2010 in determining the fair valuation of the Trust’s investments:


	Investments in Securities

Valuation Inputs	Level 1		Level 2		Level 3		Total

Assets:
Long-Term Investments ¹		—	$	20,429,512		—	$	20,429,512
Short-Term Securities	$	441,806		—		—		441,806

Total	$	441,806	$	20,429,512		—	$	20,871,318


¹	See above Schedule of Investments for values in each sector.



BLACKROCK CALIFORNIA INVESTMENT QUALITY MUNICIPAL TRUST, INC.	APRIL 30, 2010	3

Item 2 –	Controls and Procedures

2(a) –	The registrant's principal executive and principal financial officers or persons performing similar functions have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”)) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13(a)-15(b) under the Securities Exchange Act of 1934, as amended.

2(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) 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

	Certifications – Attached hereto

	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.

	BlackRock California Investment Quality Municipal Trust, Inc.

	By:	/s/ Anne F. Ackerley
		Anne F. Ackerley
		Chief Executive Officer of
		BlackRock California Investment Quality Municipal Trust, Inc.

	Date: June 28, 2010

	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/ Anne F. Ackerley
		Anne F. Ackerley
		Chief Executive Officer (principal executive officer) of
		BlackRock California Investment Quality Municipal Trust, Inc.

	Date: June 28, 2010

	By:	/s/ Neal J. Andrews
		Neal J. Andrews
		Chief Financial Officer (principal financial officer) of
		BlackRock California Investment Quality Municipal Trust, Inc.

	Date: June 28, 2010