The USA Pro Cycling Challenge will race to the final stretch in downtown Denver today. The 9.5-mile time trial will end in Civic Center Park at approximately 3:45 p.m. after racing through City Park. Portions of Colfax Avenue and Speer Boulevard will be closed to traffic today from 10 a.m. - 4 p.m. to allow room on the road for the cyclists. Click here to download a route map of the race. The event is free and open to the public.