The Pumpkinman Triathlon returns to Lake Mead this weekend.
About 1,400 athletes will race through the recreation area Saturday. The swim portion of the race takes place at Boulder Beach.
The athletes will then bike along Lakeshore Road for 12.4 miles. The final leg is a 5K race through the streets of Boulder City.
Visitors to the lake may experience delays. Drivers should be cautious passing cyclists.
The transition points and race day check-in starts at 5 a.m. and the course will close at 2 p.m.
For more information about the event, including interactive maps of the routes racers will take, go to http://bbsctri.com/pumpkinman.