For the 18th year, Scott Tinley’s Triathlon returns to Lake Lopez

A three-day festival based around the longest running off-road triathlon in the industry will be held Sept. 28-30 at Lopez Lake in Arroyo Grande.

Five different triathlon events will take place, incluring on- and off-road courses. Races will feature open water lake swimming, cycling through fields and running the hills around the lake.

The Friday session will feature separate 1- and 2-mile mountain bike races. The Saturday session will showcase four on-road triathlons: a sprint distance, a long course, an international race and a kids triathlon.

The off-road sprint triathlon is scheduled for that Sunday.