The fourth annual Reston Kids Triathlon will ride and run through South Reston on Sunday.

While registration for the event for athletes ages 6 to 14 is full, here are some things to know if you want to watch the race or need to get around Sunday while the racers are in the streets.

The race begins at 8 a.m. at Ridge Heights Pool, 11400 Ridge Heights Rd.

The bike course will travel down Ridge Heights to Seahawk Drive (younger kids) and on Ridge Heights Road, Soapstone Drive and South Lakes Drive (older kids). Roads will not be completely closed, but lanes will be blocked. Drivers should plan ahead and proceed with caution.

The running portion will take place on the Reston Association paths around Terraset Elementary, Langston Hughes Middle School and South Lakes High School. The finish line is at the west end of Langston Hughes.

On Saturday from 2 to 4 p.m., Gearin’ Up Bicycles is teaming up with the Reston Kids Triathlon to hold a one-day collection of used bicycles at the Packet Pickup for the triathlon at the YMCA Fairfax County Reston. The donated bikes will be used for Earn-A-Bike and job training programs in D.C., where kids and adults will recondition the bicycles while learning mechanic skills. For more information, visit www.GearinUpBicycles.org.

The triathlon will benefit programs at the YMCA Fairfax County Reston and Reston Association.

Photo: Reston Kids Triathlon/File photo by Charlotte Geary