Saturday, October 17th, 2026
11200 Base Line Rd, Rancho Cucamonga CA
5K
58–82°F · low rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
51–76°F
dry
2024
58–70°F
dry
2023
64–88°F
dry
2022
56–82°F
dry
2021
56–80°F
dry
2020
69–94°F
dry
2019
58–79°F
dry
2018
50–82°F
dry
2017
68–94°F
dry
2016
59–68°F
rain
Best months to race in California →
About this race
E3's 21st annual 2K/5K Fun Run, Saturday, October 17, 2026. Festivities begin at 7:45AM. Theme is Once Upon a Fun Run. Make the event even more fun by participating in our book exchange! Bring a gently used TK-8th grade reading book and swap it for a different one to take home. There will be raffle prizes and light refreshments for all race participants.
Course map
Train with a club
Run clubs near Rancho Cucamonga to train with before race day.
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.