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Running Calendar near Lake Forest 2026-2027

Monthly updates for Lake Forest

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

Explore the top running races near Lake Forest for 2026-2027! We've gathered 98 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
January 2026
Jan
10
Sa

Citrus Heritage Run

5 km 10 km Half Marathon
Jan
10
Sa

OC Trail Runners Group Run

Trail Run 8 mi
Jan
11
Su

The Cookie Classic Half Marathon

5 km 10 km 10 mi Half Marathon
Jan
18
Su

Marshmallow Dash Half Marathon

5 km 10 km 10 mi 13 mi
Jan
24-25
Sa - Su

Socal Spartan Event Weekend

Obstacle Run 5 km 10 km Half Marathon
Jan
24
Sa

Super Warrior 5K

5 km
Jan
24
Sa

Radiant Futures

5 km
Jan
30
Fr

Disneyland Half Marathon Weekend

5 km 10 km Half Marathon
Jan
31
Sa

LASAA Mug Run - LASD Norwalk Sheriff's Station

5 km 10 km
February 2026
Feb
1
Su

Surf City Marathon

5 km Half Marathon Marathon
Feb
7
Sa

Trojan Trot 5K - Turtle Rock

5 km
Feb
7
Sa

Run for Russ

5 km
Feb
8
Su

Galentine's Run: Besties Run Together

5 km 10 km Half Marathon
Feb
8-22
Su

Anaheim Ducks 5K

5 km
Feb
13
Fr

Camp Heartbreak Half Marathon

5 km 10 km Half Marathon
Feb
14
Sa

The HEART RUN Half Marathon

5 km 10 km 13 mi
Feb
14
Sa

ONT's Runway 5K

3 mi
Feb
18
We

Shadow Strike Unsanctioned Run

4 mi
Feb
22
Su

BRAVE Race

5 km 10 km
Feb
22
Su

Brea 8K Classic

8 km