Runners of all ages and abilities are invited to partake in a 5K or 10K hosted by NorCalUltras. Participants at both glow-in-the-dark races will be surrounded by neon lighting and given swag bags, post-race food, and refreshments. Winners will receive a voucher and free pair of Altra trail running shoes. The races begin at Auburn’s Overlook Park at 8:45 p.m.