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Half Marathon Calendar near Alameda County 2026-2027

Monthly updates for Alameda County

Get new running races (and updates) in your inbox every month.

Explore the top half marathons near Alameda County for 2026-2027! We've gathered 25 exciting races in the area. Check out our detailed list below to find your next local race.

February 2026
Feb
7
Sa

Mt. Umunhum Trail Conquest - Winter

Trail Run 5 km 7 mi ... 26 mi 50 km
Feb
14
Sa

Bay Breeze - San Leandro

Trail Run 5 km 10 km Half Marathon
Feb
21
Sa

Redtail Ridge

Trail Run 5 km 10 km ... 30 km 50 km
March 2026
Mar
1
Su

Livermore Valley Half Marathon

5 km Half Marathon
Mar
28
Sa

Western Pacific Marathon

Trail Run 5 km 10 km Half Marathon
April 2026
Apr
4
Sa

Diablo Trails Challenge

Trail Run 5 km 10 km Half Marathon 50 km
Apr
11
Sa

Lake Chabot Trail Run

Trail Run 8 km Half Marathon ... Marathon 50 km
Apr
18
Sa

Badger Cove Half Marathon

Trail Run 5 km 10 km Half Marathon
Apr
18
Sa

Woodside Crossover

Trail Run 10 km Half Marathon 35 km 50 km
May 2026
May
10
Su

Trailquake

Trail Run 5 km 10 km Half Marathon
May
30
Sa

San Jose Half Marathon

8 km Half Marathon
May
30
Sa

Beer City Half San Jose

5 km 10 km 13 mi
June 2026
Jun
7
Su

Lake Chabot Trail Challenge

Trail Run 5 km Half Marathon
Jun
26-29
Fr - Mo

The Rock The Loch Half Marathon

Trail Run 5 km 10 km Half Marathon
July 2026
Jul
18
Sa

Bad Bass - Castro Valley

5 km 10 km Half Marathon
August 2026
Aug
1
Sa

Summer Breeze

5 km 10 km Half Marathon
Aug
15
Sa

Beer City Half Marathon

5 km 10 km 13 mi
September 2026
Sep
6
Su

Diablo Trail Run

Trail Run 4 mi 10 mi ... 26 mi 50 km
Sep
12
Sa

Beer City Half Bishop Ranch

5 km 10 km Half Marathon
Sep
27
Su

Spartan Trail - San Jose Trail Challenge

Trail Run 10 km Half Marathon 50 km