Registration closes: Tue, Oct 13 @ 12:00AM

Race Overview

The Endurance Challenge 100/50 is a point-to-point, fast & flat 100 mile and 50 mile urban ultra-marathon. The EC100/50 is one of the easiest 100/50 mile races on the West Coast, and is ideal for your first 50 or 100 mile race, whether you're a runner or walker, with a very generous 16-hour cut-off for the 50 mile race (11 p.m. on 10/17), and 32-hour cut-off for the 100 mile race (3 p.m. on 10/18). You'll also be supporting the 100 Mile Club, a non-profit organization with programs currently in over 1,000 schools throughout the U.S. that provides an opportunity for school kids to run/walk 100 miles during the school year, as all race proceeds will be donated to the 100 Mile Club.*

The race takes place from Saturday, October 17, 2015, to Sunday, October 18, 2015. The route for the Endurance Challenge 100/50 begins shortly after sunrise at 7:00 a.m. with a grand send off by energetic 100 Mile Club school kids from throughout Southern California at the 100 Mile Club headquarters in Norco, CA, aka "Horse Town, USA". Then it's "westward ho!" as we run through Corona to the start of the Santa Ana River bike path. Our first major check-point is in Anaheim at Mile 25, as we pass within a stone's throw from the iconic Anaheim Angels 210 ft. tall "Big A", and then it's straight to the Pacific Ocean, in Huntington Beach. When we hit the sand, we turn due north and run along the beach path, passing through the Beach Boys "Surf City, USA" Huntington Beach Pier on our way to the 50 mile finish line in Long Beach. (11 p.m. cut-off.)

From there the 100 mile runners continue north, passing by the Queen Mary in all it's nighttime splendor, and weave our way inland through various SoCal cities, including the renowned Rolling Hills Estates and Palos Verdes, joining the coast once again in Redondo Beach. The final 20 mile coastline stretch continues on the beach bike path past the Hermosa Beach and Manhattan Beach Piers, Dockweiler State Beach, Marina Del Rey, with a final push along the Venice boardwalk, finishing just steps from the world famous Santa Monica Pier. (32-hour cut-off at 3 p.m. on Sunday, 10/18.) Athletes who participate in the 100 mile event will run through three Southern California counties, traversing 22 cities.

This year the race is limited to a very lucky seventy-seven (77) enthusiastic athletes that will race the clock and each other in this unique, fun and challenging event.

*Proceeds from EC100 go directly to the 100 Mile Club charity to support efforts to fight childhood inactivity and obesity and encourage children to seek out their personal best in school, at home, on the field, and in life. For more information about starting a 100 Mile Club at your elementary or middle school, visit their website at Please consider donating directly to the 100 Mile Club at: Donations are 100% tax deductible and every $10 donation sponsors one underprivileged school child for one year membership in the 100 Mile Club.

Course Description

The EC100 Ultramarathon offers an ideal course for all – the experienced ultrarunner who wants to set a new PR, as well as for the athlete who has done shorter races before who now wants to attempt to run 50 or 100 miles for the first time. The course begins at the 100 Mile Club HQ in Norco, CA and travels across (mostly urban) Southern California to the Santa Monica Pier. The route of the EC100 passes through Corona before following the Santa Ana River Trail to the coast. From there, the runners continue along the Huntington Beach Bike Trail followed by Pacific Coast Highway. The event ends in Long Beach for those running the 50-mile event. The course takes on a more rural feel through Palos Verdes before returning to the coast along the “Strand”. Those that make it through the night are able to experience both the sunset and sunrise as they run along the California coast. At the finish, runners experience textbook SoCal as they run through the wild and festive Venice Beach boardwalk and on toward the finish line at the beautiful and famous Santa Monica Pier.


There is a 16-hour time limit for the EC50 and a 32-hour time limit for the EC100. *Mandatory Check-In Stations* Mandatory Check-In Stations will be available at the approximate 25, 50 and 75 (EC100 only) mile-marks. All EC100 athletes must check in and be weighed at each Check-In Station. Water and basic supplies will be available at each of the stations. *Sub Stations* Sub-stations will be placed approximately every 12.5 miles. It is not required to stop here but this is where crews should meet to aid runners. Time in/time out will be recorded and broadcast via twitter. *Meet-Me Stations* Meet-Me Stations will be approximately every 6 miles or so. This is where crew may congregate to catch runners, etc.

Spectator Tips

We encourage ALL spectators to meet us at the START Line and FINISH Line. For those who are up for a little adventure, you may also meet us along the way at any of the Check-In/Sub/Meet-Me Stations. In addition, you may follow the race via Twitter @EC100 or on Facebook at EC100EC. *Awards* Those who finish the full 100 miles within the time limit of 32 hours will receive a sub-30 hour buckle. We will be awarding special sub-24 buckles to participants who finish the course in less than 24 hours. It is our goal to present your buckle to you at the finish line. In the event that more runners finish than we have buckles, we will award buckles to finishers as they arrive and order and ship the remaining. Runners who complete the 50-mile course will receive a medal.

Cancellation & Refund Policy

100EC has a no refund policy. Please note that we do not offer any refunds or discount codes if you cancel your registration for this event.

Local time: 4:20 PM


Alfa Severino
Race Director
Ed Ettinghausen
Race Director

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