The eighth annual Reston Sprint Triathlon will go through North Reston on Sunday, and area residents may want to plan accordingly if they have to be somewhere.

Roads will not be closed outright, but some lanes will be blocked to accommodate the bikers on the course.

Registration for the race, which will benefit Cornerstones, is full.

The race begins at 7 a.m. with a quarter-mile swim at Lake Newport Pool. There will be a 12-mile bike portion featuring three loops from Lake Newport Road to Reston Parkway to Wiehle Avenue to Baron Cameron Avenue then again on Reston Parkway back to the pool (see map).

Race officials have given this advice to riders: “Beware of the turn at Reston Parkway and Wiehle Ave. It is downhill and more than 90 degrees. Also, watch for cars encroaching into the bike lanes at Baron Cameron and Reston Parkway. Drivers may not understand how to make a right turn, when we have closed the turn lane.”

The 5K run course will take place on Reston Association paths in the North Village Road/Center Harbor/Wiehle Avenue vicinity.

Race officials are also advising participants and spectators not to park on residential streets. Parking is available in the soccer field lot across Reston Parkway from Lake Newport Pool or at North Point Shopping Center.

Graphic of Reston Sprint Triathlon bike course. Credit/Reston Sprint Triathlon