Race catalog · Updated nightly
Upcoming running, cycling, triathlon and ultra races, updated nightly from RunSignup, BikeReg and ACTIVE. Missing a race? Submit it
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60 races within 25 mi of Lake Forest, CA
Riverside, CA24 mi away
Ideal weather · 98/100 Typical: 63° / 41°F · 19% rain
7% slower times (5K)past finishers
Anaheim, CA15 mi away
Ideal weather · 99/100 Typical: 65° / 46°F · 18% rain
32% slower times (5K)past finishers
Huntington Beach, CA19 mi away
Ideal weather · 94/100 Typical: 63° / 55°F · 20% rain
Irvine, CA8 mi away
Ideal weather · 98/100 Typical: 63° / 55°F · 19% rain
Huntington Beach, CA19 mi away
Ideal weather · 94/100 Typical: 63° / 55°F · 21% rain
5% slower times (5K)past finishers
Irvine, CA3 mi awayRegistration opens Nov 9, 2026
Ideal weather · 97/100 Typical: 65° / 49°F · 23% rain
Huntington Beach, CA16 mi away
Ideal weather · 85/100 Typical: 62° / 54°F · 24% rain
Aliso Viejo, CA5 mi away
Ideal weather · 97/100 Typical: 65° / 49°F · 23% rain
5% slower times (5K)past finishers
Brea, CA22 mi awayRegistration opens Nov 1, 2026
Ideal weather · 97/100 Typical: 65° / 46°F · 23% rain
Anaheim, CA15 mi away
Ideal weather · 99/100 Typical: 68° / 48°F · 18% rain
Irvine, CA3 mi away
Ideal weather · 97/100 Typical: 67° / 51°F · 16% rain
9% faster times (5K)past finishers
Silverado, CA9 mi away
Ideal weather · 100/100 Typical: 72° / 46°F · 12% rain
Yorba Linda, CA19 mi away
Ideal weather · 100/100 Typical: 69° / 49°F · 13% rain
Huntington State Beach, CA16 mi away
Ideal weather · 100/100 Typical: 64° / 56°F · 9% rain
6% slower times (5K)past finishers
Corona, CA17 mi away
Ideal weather · 88/100 Typical: 74° / 47°F · 8% rain
Rancho Santa Margarita, CA4 mi away
Ideal weather · 100/100 Typical: 71° / 54°F · 6% rain
Fountain Valley, CA16 mi away
Ideal weather · 100/100 Typical: 65° / 57°F · 5% rain
Irvine, CA8 mi away
Ideal weather · 100/100 Typical: 65° / 57°F · 5% rain
21% slower times (5K)past finishers
Huntington Beach, CA21 mi away
Ideal weather · 100/100 Typical: 65° / 57°F · 5% rain
21% slower times (5K)past finishers
Mission Viejo, CA3 mi away
Ideal weather · 92/100 Typical: 71° / 54°F · 6% rain
Huntington Beach, CA21 mi away
Ideal weather · 99/100 Typical: 65° / 57°F · 6% rain
10% slower times (5K)past finishers