Lace up your shoes for the Brea Reservoir parkrun, a vibrant weekly 5K event set for Saturday, January 17, 2026, in Fullerton, CA. This free, fun, and friendly gathering welcomes walkers, joggers, runners, volunteers, and spectators of all abilities to experience a unique Southern California course. Expect typical race day conditions with pleasant highs around 71F and comfortable lows near 47F, with only a 9% chance of precipitation, creating an inviting environment for your morning activity.

The Brea Reservoir parkrun boasts an engaging out-and-back course, accurately measured at 5000m. Starting and finishing near the Brea Reservoir Dam Wall, participants will navigate a scenic route that blends asphalt and packed dirt paths, heading east into the picturesque Fullerton "lost trail" before making a turnaround. Runners often highlight the course's scenic views, including panoramic glimpses over the valley while crossing the Brea Dam. While generally accessible, be prepared for some elevation changes, as sections are described as "quite hilly" with a "short but tiring Dam climb," offering a rewarding challenge. This volunteer-led event emphasizes community spirit, providing a supportive and encouraging atmosphere for everyone to achieve their personal best or simply enjoy the outdoors.

Beyond the invigorating run, the Brea Reservoir parkrun fosters a strong sense of community. Participants frequently gather for a post-event coffee at Coffee Up Roastery, offering a chance to connect with fellow runners and volunteers. As a recurring weekly event, it's an excellent opportunity to establish a consistent fitness routine, meet new people, and be part of a global movement promoting health and well-being. This inclusive 5K is entirely organized by dedicated volunteers, ensuring a welcoming experience for all who register and bring their barcode to participate.