May 18, 8:00AM

Murrell Park

The Rock Dallas Triathlon will be from 8 a.m.–2 p.m. Saturday, May 18 at Murrell Park, 880 Simmons Road in Flower Mound. The off-road triathlon includes a 1,200-meter swim, a 13.4-mile mountain bike ride and a 5.6-mile run. The race will take place on the Northshore trail on Lake Grapevine, starting at Murrell Park. To register, visit