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Half Marathon Calendar near Lake Forest 2025-2026

Explore the top half marathons near Lake Forest for 2025-2026! We've gathered 39 exciting races in the area. Check out our detailed list below to find your next local race.

September 2025
Sep
28
Sunday

90s Remix Run – Half Marathon

5 km 10 km 10 mi Half Marathon
October 2025
Oct
12
Sunday

Runacopia Half Marathon - Riverside

5 km 10 km 15 km Half Marathon
Oct
12
Sunday

Witches Wave - Halloween Run Half Marathon

5 km 10 km Half Marathon
Oct
19
Sunday

Mission Inn Run

5 km 10 km Half Marathon
Oct
25
Saturday

Caspers Trail Races

Trail Run 10 km 13 mi ... Marathon 50 km
Oct
26
Sunday

Halloween Havoc Half Marathon - Fountain Valley, CA

5 km 10 km Half Marathon
Oct
26
Sunday

Monster Dash Half Marathon - Irvine

Urban Trail 5 km 10 km 15 km Half Marathon
November 2025
Nov
1
Saturday

Beer City Half Marathon

5 km 10 km Half Marathon
Nov
1
Saturday

Día de los Muertos Run Half Marathon

5 km 10 km Half Marathon
Nov
22
Saturday

Giving Thanks Half Marathon - Long Beach

5 km 10 km 15 km Half Marathon
Nov
28
Friday

Turkey Trot Half Marathon - Long Beach

5 km 10 km 15 km Half Marathon
Nov
29
Saturday

Mash + Dash Half Marathon

5 km 10 km 10 mi 13 mi
Nov
30
Sunday

Turkey Trot Half Marathon - Irvine

5 km 10 km 15 km Half Marathon
December 2025
Dec
6
Saturday

Season's Greetings Half Marathon - Long Beach

5 km 10 km 15 km Half Marathon
Dec
7
Sunday

Jingle Bell Jog – Half

5 km 10 km 10 mi Half Marathon
Dec
12
Friday

Holiday Half Marathon

5 km Half Marathon
Dec
13
Saturday

The Jingle Bell Dash Half Marathon

5 km 10 km Half Marathon
Dec
20
Saturday

Santa’s Reindeer Run Half Marathon

5 km 10 km Half Marathon
Dec
20
Saturday

Reindeer Run Half Marathon - Long Beach

5 km 10 km 15 km Half Marathon
Dec
21
Sunday

Reindeer Run Half Marathon - Riverside

5 km 10 km 15 km Half Marathon
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