Filed Pursuant to Rule 424(b)(3)
Registration No. 333-140240

June 2008 Performance Update

The Frontier Fund Supplement Dated July 10, 2008 to Prospectus Dated May 27, 2008

T H E     F RO N T I E R     F U N D ’ S     G O A L : To provide you – the investor – with a managed futures product that, over the long term, provides attractive returns, reduces volatility, and improves the overall performance of your investment portfolio.

June performance for the various Series of The Frontier Fund is detailed below:*

The Frontier Fund Class 1	June 30, 2008 MTD		June 30, 2008 YTD		NAV /Unit
Balanced Series-1	5.50	%	13.81	%	$	115.47
Balanced Series-1a	5.53	%	13.74	%	$	103.39
Campbell/Graham/Tiverton Series-1	4.52	%	9.21	%	$	100.37
Currency Series-1	-0.38	%	3.24	%	$	103.92
Long/Short Commodity Series-1	4.54	%	10.93	%	$	112.56
Winton/Graham Series-1	3.28	%	17.72	%	$	111.88
Winton Series-1	4.16	%	12.16	%	$	127.68
Long Only Commodity Series-1	9.85	%	29.49	%	$	143.47
Managed Futures Index Series-1	3.16	%	9.47	%	$	110.12

Additional information, including monthly rates of return, concerning the aforementioned Series and the Trading Advisor(s) is contained in the Prospectus and the respective Series Appendix to the Prospectus.

* The above table sets forth the actual performance for the Class and Series as of June 30, 2008. Actual gross trading performance (gross realized and unrealized gain/loss before deduction for trading commissions and fees, management fees, any other expense, and before addition of interest income) is adjusted for the trading expenses, management fees, initial service fees, on-going service fees, and interest income of the applicable Series.

THIS INSERT MUST BE ACCOMPANIED OR PRECEDED BY THE CURRENT PROSPECTUS OF THE FRONTIER FUND

PAST PERFORMANCE IS NOT INDICATIVE OF FUTURE RESULTS

THE FRONTIER FUND BALANCED SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	2,701,997.74
Unrealized trading gain/(loss)		7,309,651.45
Less: commissions		(140,948.29	)
Less: FCM fees		(126,717.16	)
Foreign currency gain/(loss)		21,483.95
Interest income		19,907.38
Total Income		9,785,375.07
EXPENSES
Management fees		101,575.25
Incentive fees		(1,859,674.92	)
Broker service fees		524,894.18
Total Expenses		(1,233,205.49	)
Net Income (Loss)	$	11,018,580.56

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$’s per unit
Net Asset Value, end of prior month	1,824,456.90488		$	199,692,051.61		109.45
Current month additions	42,058.84089			4,738,125.94
Current month redemptions	(27,808.02776	)		(3,130,379.14	)
Net Income (loss) for current month				11,018,580.56
Net Asset Value, end of current month	1,838,707.71801		$	212,318,378.97		115.47
Monthly rate of return						5.50	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                /s/ S. Brent Bales                

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Balanced Series 1

THE FRONTIER FUND BALANCED SERIES - 1A

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	74,118.37
Unrealized trading gain/(loss)		214,095.49
Less: commissions		(4,073.24	)
Less: FCM fees		(3,655.23	)
Foreign currency gain/(loss)		607.60
Interest income		8,896.82
Total Income		289,989.81
EXPENSES
Trading Fee		5,942.79
Management fees		3,694.84
Incentive fees		(53,721.73	)
Broker service fees		15,133.64
Total Expenses		(28,950.46	)
Net Income (Loss)	$	318,940.27

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$’s per unit
Net Asset Value, end of prior month	59,116.62020		$	5,791,538.38		97.97
Current month additions	365.03067			36,747.47
Current month redemptions	(1,020.66003	)		(103,106.39	)
Net Income (loss) for current month				318,940.27
Net Asset Value, end of current month	58,460.99084		$	6,044,119.73		103.39
Monthly rate of return						5.53	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                    

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Balanced Series 1A

THE FRONTIER FUND CAMPBELL/GRAHAM/TIVERTON SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	3,849,057.95
Unrealized trading gain/(loss)		(579,850.04	)
Less: commissions		(16,183.09	)
Less: FCM fees		(35,359.28	)
Foreign currency gain/(loss)		(11,382.94	)
Interest income		9,609.44
Total Income		3,215,892.04
EXPENSES
Management fees		181,480.77
Incentive fees		297,751.90
Broker service fees		148,630.05
Total Expenses		627,862.72
Net Income (Loss)	$	2,588,029.32

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$’s per unit
Net Asset Value, end of prior month	594,044.73177		$	57,043,475.46		96.03
Current month additions	12,725.43933			1,249,245.55
Current month redemptions	(10,975.67364	)		(1,082,998.62	)
Net Income (loss) for current month				2,588,029.32
Net Asset Value, end of current month	595,794.49746		$	59,797,751.71		100.37
Monthly rate of return						4.52	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                    

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Campbell/Graham/Tiverton Series 1

THE FRONTIER FUND CURRENCY SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	(31,473.06	)
Unrealized trading gain/(loss)		30,132.16
Less: FCM fees		(6,648.20	)
Interest income		2,575.24
Total Income		(5,413.86	)
EXPENSES
Management fees		9,416.87
Incentive fees		—
Broker service fees		30,421.21
Total Expenses		39,838.08
Net Income (Loss)	$	(45,251.94	)

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$’s per unit
Net Asset Value, end of prior month	116,355.44212		$	12,138,485.24		104.32
Current month additions	2,411.63011			246,678.80
Current month redemptions	(1,399.95227	)		(143,018.12	)
Net Income (loss) for current month				(45,251.94	)
Net Asset Value, end of current month	117,367.11996		$	12,196,893.98		103.92
Monthly rate of return						-0.38	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                    

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Currency Series 1

THE FRONTIER FUND LONG/SHORT COMMODITY SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	1,966,484.79
Unrealized trading gain/(loss)		601,721.33
Less: commissions		(32,935.68	)
Less: FCM fees		(17,898.36	)
Foreign currency gain/(loss)		—
Interest income		66,715.82
Total Income		2,584,087.90
EXPENSES
Management fees		125,456.01
Incentive fees		305,915.02
Broker service fees		118,290.73
Total Expenses		549,661.76
Net Income (Loss)	$	2,034,426.14

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$’s per unit
Net Asset Value, end of prior month	410,622.33576		$	44,211,600.49		107.67
Current month additions	21,444.32327			2,385,374.48
Current month redemptions	(2,398.60029	)		(267,207.65	)
Net Income (loss) for current month				2,034,426.14
Net Asset Value, end of current month	429,668.05874		$	48,364,193.46		112.56
Monthly rate of return						4.54	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                    

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Long/Short Commodity Series 1

THE FRONTIER FUND WINTON/GRAHAM SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	692,177.24
Unrealized trading gain/(loss)		(73,511.55	)
Less: commissions		(4,116.87	)
Less: FCM fees		(4,685.61	)
Foreign currency gain/(loss)		(1,814.31	)
Interest income		2,266.02
Total Income		610,314.92
EXPENSES
Management fees		23,498.95
Incentive fees		108,148.98
Broker service fees		33,486.55
Total Expenses		165,134.48
Net Income (Loss)	$	445,180.44

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$’s per unit
Net Asset Value, end of prior month	108,123.67772		$	11,712,828.86		108.33
Current month additions	35,226.67378			3,878,396.28
Current month redemptions	(1,023.68338	)		(112,888.21	)
Net Income (loss) for current month				445,180.44
Net Asset Value, end of current month	142,326.66812		$	15,923,517.37		111.88
Monthly rate of return						3.28	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                    

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Winton/Graham Series 1

THE FRONTIER FUND WINTON SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	1,375,437.30
Unrealized trading gain/(loss)		2,157,803.05
Less: commissions		(10,243.19	)
Less: FCM fees		(22,407.09	)
Foreign currency gain/(loss)		(1,867.93	)
Interest income		14,055.60
Total Income		3,512,777.74
EXPENSES
Management fees		90,267.33
Incentive fees		667,446.08
Broker service fees		162,341.11
Total Expenses		920,054.52
Net Income (Loss)	$	2,592,723.22

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$’s per unit
Net Asset Value, end of prior month	511,448.49529		$	62,691,461.73		122.58
Current month additions	549.71887			68,770.22
Current month redemptions	(6,979.54513	)		(874,020.50	)
Net Income (loss) for current month				2,592,723.22
Net Asset Value, end of current month	505,018.66903		$	64,478,934.67		127.68
Monthly rate of return						4.16	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                        

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Winton Series 1

THE FRONTIER FUND LONG ONLY COMMODITY SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	606,155.79
Unrealized trading gain/(loss)		26,506.61
Less: commissions		—
Less: FCM fees		(3,117.84	)
Foreign currency gain/(loss)		—
Interest income		9,432.51
Total Income		638,977.07
EXPENSES
Management fees		7,805.38
Incentive fees		—
Broker service fees		11,286.23
Total Expenses		19,091.61
Net Income (Loss)	$	619,885.46

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units		Dollars			$'s per unit
Net Asset Value, end of prior month	47,474.96172		$	6,200,167.55		130.60
Current month additions	2,472.41575			343,257.66
Current month redemptions	(547.34522	)		(76,087.98	)
Net Income (loss) for current month				619,885.46
Net Asset Value, end of current month	49,400.03225		$	7,087,222.69		143.47
Monthly rate of return						9.85	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                    

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Long Only Commodity Series 1

THE FRONTIER FUND MANAGED FUTURES INDEX SERIES - 1

STATEMENT OF INCOME (LOSS)

FOR THE MONTH ENDED

June 30, 2008

(Unaudited)

	Current Period
INCOME
Realized trading gain/(loss)	$	27,041.63
Unrealized trading gain/(loss)		15,885.71
Less: commissions		(404.90	)
Less: FCM fees		(556.78	)
Foreign currency gain/(loss)		(146.21	)
Interest income		1,720.36
Total Income		43,539.81
EXPENSES
Management fees		2,227.80
Incentive fees		—
Broker service fees		2,129.78
Total Expenses		4,357.58
Net Income (Loss)	$	39,182.23

STATEMENT OF CHANGES IN NET ASSET VALUE

	Units	Dollars		$’s per unit
Net Asset Value, end of prior month	11,363.93363	$	1,213,126.89	106.75
Current month additions	510.05158		55,269.94
Current month redemptions	—		—
Net Income (loss) for current month			39,182.23
Net Asset Value, end of current month	11,873.98521	$	1,307,579.06	110.12
Monthly rate of return				3.16	%

To the best of my knowledge and belief, the information

contained in this statement is accurate and complete

                    /s/ S. Brent Bales                    

S. Brent Bales, Chief Accounting Officer of the Managing Owner

Equinox Fund Management LLC

1660 Lincoln Street, Suite 100

Denver, Colorado 80264

On Behalf of the Frontier Fund - Managed Futures Index Series 1