What distances and start times are available?

• →50K Ultra Marathon: 8:00 AM
• →35K (22 miles / "Classic"): 8:15 AM
• →21K Half Marathon: 8:30 AM
• →10K: 8:45 AM
• →5K: 9:00 AM

What is the course character for the different distances?

• →50K, 35K, and 21K: These routes consist primarily of single-track trails through pine, fir, and cedar forests, offering classic mountain trail running terrain and scenic vistas. Detailed course maps can be found at Arnoldrimtrail ↗, Arnoldrimtrail ↗, and Arnoldrimtrail ↗.
• →10K and 5K: These distances loop around White Pines Lake and include quality single-track sections. Course details are available at Arnoldrimtrail ↗ and Arnoldrimtrail ↗.

What are the race rules and time limits?

• →All runners must complete their distance and be off the course by the 9-hour time limit, which concludes at 5:00 PM.
• →The event is strictly a trail/single-track event.
• →Timing for all distances is provided by OnYourMark ↗.

Where do the races start and finish?

• →50K & 35K: These distances start via a shuttle to the Fullen Road, Arnold Rim Trail Post 100 Access Point.
• →21K, 10K & 5K: These distances start at White Pines Park.
• →All distances finish at White Pines Park (1965 Blagen Rd, Arnold, CA).

What amenities are provided for participants?

• →Post-race food service begins at 11:00 AM, featuring Pizza Factory service with vegetarian options.
• →Sweet and salty snacks and fresh fruit are also provided.

What is the policy regarding dogs?

• →Dogs are permitted on the Arnold Rim Trail and at White Pines Park.
• →Dogs must be kept on a leash at all times.
• →Runners accompanied by dogs are required to start at the back of the pack to allow all other participants to pass first.

Are there lodging discounts available for runners?

• →Meadowmont Lodge: Call to mention "Run the Rim" for a 5% discount.
• →Timberline Lodge: Use promo code 2026arnoldrimtrailrun when staying from May 30 – June 1 for a 10% discount.