Set your sights on a vibrant 5K experience at the Brea Reservoir parkrun on April 18, 2026, in Fullerton, CA. This free, fun, and friendly weekly event welcomes runners, joggers, and walkers of all paces to enjoy a scenic out-and-back course. Starting and finishing near the Brea Reservoir Dam Wall, the route features a mix of asphalt and packed dirt paths that lead participants east into the "Fullerton lost trail" before a turnaround at N Brea Blvd. Runners have noted the course as scenic, with a "short but tiring Dam climb" and views over the valley, adding a subtle challenge to this otherwise accessible event.

You can expect typical race day conditions with comfortable highs around 75F and lows around 55F, accompanied by a minimal 2% chance of precipitation. While the course is run entirely on permanent paths, be aware that some sections may accumulate mud, leaves, and puddles after rain. Brea Reservoir parkrun prides itself on its strong community spirit, entirely organized by dedicated volunteers. After crossing the finish line, many participants extend their morning by joining fellow parkrunners for a post-event coffee at Coffee Up Roastery, fostering connections and camaraderie. Remember to register beforehand and bring your scannable barcode to receive a result.