Riverside Road Runners

RRCA-affiliated 501(c)(3) founded in 2010 and one of the largest clubs in the Inland Empire. The Sunday session is a structured year-round training clinic (talk, warm-up, then pace groups) aimed at marathon and half-marathon build-ups, but walkers and total beginners are explicitly welcome. Club membership is registered through RunSignUp; the dues amount is not published on the club site.