Trails Challenge 2026
September 30 at 1am
Hayward
Self-paced regional park exploration


Don Castro hides a surprise: a spring-fed swimming lagoon with real sand, lifeguards, and water that reaches five feet deep. Bring the kids, claim a shaded picnic table early, and pretend you're at the beach without the drive.


Don Castro hides a surprise: a spring-fed swimming lagoon with real sand, lifeguards, and water that reaches five feet deep. Bring the kids, claim a shaded picnic table early, and pretend you're at the beach without the drive.