Marathon races in California, United States — 2026 running calendar

Redwood (Summer) Trail Run

Oakland, California, United States

Aug 15, 2026 (Sat)

Free - $90.00

Trail running, Running

8K Half-Marathon 30K Marathon +2

SPASM Crystal Springs Trail Run

Woodside, California, United States

Aug 29, 2026 (Sat)

Free - $90.00

Trail running, Running

10K Half-Marathon 35.4K Marathon +2

Diablo Trail Run

Clayton, California, United States

Sep 6, 2026 (Sun)

Free - $90.00

Trail running, Running

6.4K 16.1K Half-Marathon Marathon +2

LARPD Marathon On The Move Trail Challenge

Livermore, California, United States

Sep 7, 2026 (Mon) – Oct 5, 2026

$7.00

Running

Marathon

The Syty Marathon

San Diego, California, United States

Sep 12, 2026 (Sat)

$50.00

Running

Marathon

The Running Fence Run: A Run of Freedom- Celebrating Christo's 1976 "Running Fence” art project

Bloomfield, California, United States

Sep 12, 2026 (Sat)

$45.00 - $160.00

Running

Marathon Half-Marathon 10K 5K

2026 Humboldt Redwoods Marathon, Half Marathon, 5K

Weott, California, United States

Oct 11, 2026 (Sun)

$50.00 - $120.00

Running

Half-Marathon 5K Marathon

ZombieRunner Halloween

San Jose, California, United States

Oct 31, 2026 (Sat)

Free - $80.00

Trail running, Running

5K 10K Half-Marathon Marathon +6

Two Cities Marathon

Fresno, California, United States

Nov 1, 2026 (Sun)

$60.00 - $140.00

Running

Marathon Half-Marathon 10K 5K

Lake Chabot Trail Run

Castro Valley, California, United States

Nov 7, 2026 (Sat)

Free - $90.00

Trail running, Running

7.7K Half-Marathon 30K Marathon +4

San Diego 50 & Trail Runs

Escondido, California, United States

Jan 9, 2027 (Sat)

$15.00 - $155.00

Trail running, Running

Ultra Marathon Half-Marathon 16.1K +6

The Redding Marathon Events

Redding, California, United States

Jan 17, 2027 (Sun)

$20.00 - $120.00

Running

Marathon 5K