The Fastest Course in the West!

#1 Boston Qualifier ○ Top-10 Largest US Marathon ○ Gentle Rolling Hills with a Flat, Fast Finish

Our point-to-point, net-downhill course has remained unchanged for 42 years, starting from Folsom’s scenic foothills and ending at the historical California State Capitol. CIM has provided over 100,000 runners of all speeds–from first-timers to the fastest of the fast–the best chance to achieve their marathon goals.

One of the most iconic races in the U.S. that any runner should have on their bucket list – Runners World

“​​It’s a perfect cocktail of a fast course, good weather, and dedicated runners” – Outside Magazine

One of the best marathons to Boston Qualify according to Runners World, RaceRaves, Outside, Women’s Running, & the Boston Athletic Association

World record for deepest performance marathon with more Olympic Trials Qualifiers than all other US marathons combined.

12-07-2025, 07:00 am - 03:00 pm