Grand-Am Road Racing has revealed its 2010 Rolex Sports Car Series calendar, featuring twelve multi-class races in a dozen family-friendly weekends.

The eleventh season of competition will include several staple events, including the Rolex 24 at Daytona and Sahlen's Six Hours of The Glen, as well as significant changes to a pair of sprint races at Lime Rock Park and Barber Motorsports Park.

The series will continue its focus on building fan-friendly events that appeal to the whole family and offer unparalleled access to the racing experience, including the pit-road fan walk and direct access to drivers, team members and race cars, with new activities to be introduced in the 2010 season.

Rolex Series competition returns to Lime Rock Park during Memorial Day weekend and, for the first time, GT class competitors will be joined by Daytona Prototype teams and drivers. The Rolex Series has competed at the Connecticut track four times since the series' first season in 2000.

Barber Motorsport Park also features a new date, moving its regular July race to April for the first time.

The season again begins with the 48th running of the Rolex 24 on the final weekend of January. Series regulars Scott Pruett, Alex Gurney and David Donohue - co-winner of the closest Rolex 24 in the race's history - have been challenged by star drivers from the NASCAR Sprint Cup Series, IndyCar Series and international sportscar racing. In recent years, Jimmie Johnson, Scott Dixon and Danica Patrick competed in the Rolex 24.

The 2010 Rolex 24 will also include the winner of the 2009 Sunoco Driver Challenge Award, who will drive a Daytona Prototype for a team to be announced a later date.

Other major alterations to the schedule include moving the Grand Prix of Miami at Homestead-Miami Speedway from the autumn to back to 6-8 March, the Porsche 250 at Barber Motorsports Park from July to 10-11 April, and New Jersey Motorsports Park from May to the weekend of 17 July. The season finale returns to Miller Motorsports Park near Salt Lake City, Utah, competing on the Outer Perimeter course for the first time.

The schedule also includes the prestigious road courses at which the series has competed through the years and their regular dates, returning to Virginia International Raceway for the Bosch Engineering 250, scheduled for the weekend of 24-25 April.

The series also returns to Watkins Glen in June, for the Sahlen's Six Hours, then travels to Lexington, Ohio, on the weekend of 19 June for the EMCO Gears Classic at Mid-Ohio Sports Car Course.

Competitors return to Daytona on the Fourth of July weekend and, again, will share the track with the NASCAR Sprint Cup Series, running the historic Brumos Porsche 250. New Jersey is the next stop with the new date the weekend of 17 July, and will be followed by another combination race with the Sprint Cup Series, over 7-8 August, at Watkins Glen.

The Rolex Series then crosses into Canada for its fourth race at Circuit Gilles Villeneuve in Montreal, sharing the track with the NASCAR Nationwide Series over 28-29 August, before returning for the Miller finale, scheduled for 10-11 September.