Discover the Brea Reservoir parkrun, a vibrant 5K community event set in Fullerton, CA, on February 28, 2026. This free, volunteer-led run offers a unique and engaging experience for walkers, joggers, and runners alike. The accurately measured 5000m course begins and ends on the Brea Reservoir dam wall, taking participants on an out-and-back journey into the scenic Fullerton "lost trail" before turning around at N Brea Blvd. Expect a varied terrain, featuring a mix of asphalt and packed dirt paths that can sometimes accumulate mud or puddles after rain. Runners frequently highlight the course's scenic beauty, though some note the presence of a "short but tiring Dam climb" and describe sections as "quite hilly," which may lead to a walk on the return route.

Brea Reservoir parkrun is renowned for its welcoming and friendly atmosphere, attracting local participants and visitors from around the globe. The event is entirely organized by dedicated volunteers, fostering a strong sense of community. After crossing the finish line near the dam wall, many participants extend their morning with a post-parkrun coffee at the nearby Coffee Up Roastery, a cherished tradition that allows for shared stories and camaraderie. Typical race day conditions in late February offer pleasant weather, with highs around 71F and lows around 49F, and only a 7% chance of precipitation, creating ideal conditions for a refreshing morning run or walk. Restrooms and parking are available on-site, enhancing the convenience for all attendees.