Running Races in Castro Valley, California 2026 | Browse All Races

There are 3 running races in Castro Valley, California in 2026. The next is the 2026 Lake Chabot Trail Challenge (Half Marathon & 5K) on June 7. Distances include trail runs.

2026 Lake Chabot Trail Challenge (Half Marathon & 5K)

Sun, Jun 7 · Castro Valley, CA Castro Valley

Trail 5K RunHalf Marathon

From $40 Open

The Rock the Loch 5K/10K/Half Marathon (LIVE or Virtual)

Fri, Jun 26 · Castro Valley, CA Castro Valley

Trail The Rock the Loch Half Marathon (LIVE)The Rock the Loch Half Marathon (VIRTUAL)The Rock the Loch 10K (LIVE) +3

From $30 Open Closing Soon

Lake Chabot Trail Run

Sat, Nov 7 · Castro Valley, CA Castro Valley

Trail 5K8KHalf Marathon +3

From $25 Open 30 spots left

Running Races in Castro Valley, California — 2026

2026 Lake Chabot Trail Challenge (Half Marathon & 5K)

The Rock the Loch 5K/10K/Half Marathon (LIVE or Virtual)

Lake Chabot Trail Run

All California Races