Some of the fastest track cyclists in North America are headed to the Velodrome at King County’s Marymoor Park this weekend for two days of all-out racing as part of the 2013 Marymoor Grand Prix.

Racing begins at 7 p.m. on July 19 and 20 with qualifying races starting at 1 p.m. on Friday and 9:30 a.m. on Saturday.

As one of the premier races on this year’s USA Cycling National Track Calendar, the Marymoor Grand Prix will feature several current national champions, as well as former and future Olympians, who will be competing on fixed gear bikes with no brakes and at speeds of up to 40 mph.

Special guests this year include Sarah Hammer, a double Silver Medalist at the London Olympic Games, six-time World Champion and reigning World Champion in the 6-event “all around” Omnium. Guests also include two-time Olympians Jame Carney and Giddeon Massie, and several Olympic hopefuls, including Portland native Kevin Mansker and Sammamish native Tela Crane.

Admission to the event is $5 per person; kids 16 and under are free. There will be a “Kiddie Kilo” both nights and children are encouraged to bring their bikes and helmets to participate. A beer garden sponsored by Mac and Jacks Ale will be open from 6:30-10:30 p.m. both evenings. Food is available from vendors in the park, or spectators can bring their own picnics.

King County’s Marymoor Park is home to the only velodrome in Washington.

Marymoor Park is located at 6046 West Lake Sammamish Pkwy NE, Redmond.