Orange Curtain
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Event Overview
The Orange Curtain Endurance Run takes place on June 19–20, 2026 in Cerritos, California. The event start address is 19211 Studebaker Rd.
Race Distances and Formats
The event offers a variety of race distances and timed events:
- 100K
- 50K (with Early Start and AM options)
- Marathon
- 30K
- 10K
- 24-hour race
- 12-hour race
- 6-hour race
The marathon is part of the USATF SoCal Road Grand Prix Series and is a Boston qualifying race on a certified course. The 10K is also part of the USATF SoCal Road Grand Prix Series.
Course Details
The main course is a 10 km out-and-back route on an asphalt bike path. The course is repeated multiple times depending on the race distance. Approximately 90% of the course has a dirt path next to the bike path. The course will be shared with other pedestrians and cyclists on race day.
Aid and Logistics
An aid station is located every 5 km and is stocked with typical ultra-running foods. The event is a cup-less race, so participants must bring their own hydration pack or cup. Drop bags can be left at the start line, which is passed every 10 km. The race does not provide ibuprofen or aspirin.
Registration and Discounts
Online registration for 2026 is open. Early bib pickup is available at the Snail's Pace Running Shop in Brea. Discounts are offered for members of the SoCal Ultra Running Grand Prix Series, Snail's Pace Running Club, and USATF.
Additional Information
The cutoff time for all race divisions on Saturday is 7:00 PM. Race changes are allowed up to 30 minutes before the start. Participants in the Friday evening events (100K and 24-hour) must wear a reflectorized vest and blinking lights. Pacers are allowed at night for safety. Participants under 18 are permitted with parental permission and race director approval. Visit the organization's website for the most recent information.
