From the Daily Camera
The Ironman Boulder returns Sunday, as the race brings along with it a series of road closures and traffic advisories from organizers.
• Bike course is all in Boulder County — three loops until the final leg to Boulder High School. Jay Road will be closed except for local residents. U.S. 36 will be heavily used and should be avoided. Any travelers to Estes Park /Lyons are encouraged to take Hwy. 119 to Colo. 66 Neva/Niwot Road, 63rd Street, St. Vrain, Nelson Road and 75th Street will all be part of the course. Those areas should be avoided or expect delays.
• The final stretch into Boulder High School includes the athletes taking the Four Mile Creek Path, which is closed to everyone except Ironman participants. Athletes will then use 26th Street, Iris Avenue, 19th Street to Pearl Street, 19th Street, Walnut Street, 18th Street, Canyon Boulevard to 17th Street; finishing at Boulder High School.
• Roads around Boulder High School and the finish line that will be closed are 13th Street from Friday night to Monday morning. 14th Street and Arapahoe Avenue starting 2 a.m. Sunday. Arapahoe will be closed from Broadway to 19th Street.