Oregon's Prettiest & Best Supported 100-Miler

Mountain Lakes 100 is one of the country’s most scenic 100-milers. Starting and finishing at Olallie Lake, and running along dozens of lakes, this race features the best trail running Oregon has to offer – technical and rocky sections, views of mountain peaks in every direction, and 60 miles of luscious sections of the Pacific Crest Trail. The aid stations and support on the course is outstanding. You'll be greeted by experienced volunteers who are as focused on getting you to the finish as can be.

Registration is not a lottery.
This race is a Western States 100 qualifer.

If you end up on the wait list, know that we have gone through the entire wait list by the beginning of September the last few years. Train like you'll get in and do your trail work.



Capacity: 150

Trail Work Requirement

There is a trail work requirement for this race. All runners must complete 8 hours of trail work between October 1 of the previous year and September 1 of the race year. This is a real requirement and those who do not submit their hours will forfeit their spot. Details are on the race website. For those on the wait list, this requirement applies to you too, so don't wait until the last minute.

We feel this requirement is very important and hope that many runners will learn the value of volunteering to maintain trails, and just how much fun it is, as a result. Because of this race, there is over 1,200 hours of trail work completed around the world.

Cancellation Policy

If you need to cancel your registration and it’s more than 30 days prior to the race, you will receive a 50% credit toward a future Go Beyond Racing race. This credit is equal to half the value of the race you registered for and can be applied to any of our races that aren’t already sold out. You can use this credit within 365 days of it being issued. There is no transferring of this credit. If your cancellation is 30 days or less from race day, there is no credit, no refund, or no transfer. You can read our entire cancellation policy here:
Cancellation Policy

Go Beyond Racing

This event is produced by Go Beyond Racing. We put on over three dozen trail races a year. You can count on every Go Beyond race to:

- Be highly organized with racer safety and satisfaction as top priorities
- Donate to a worthy beneficiary for each race
- Have well-stocked aid stations and the friendliest, most supportive volunteers
- Challenge and reward each participant
- Put more time, money, and energy than most to reduce, reuse, recycle, and lessen the environmental impact of our events

We look forward to sending you off on the trails and welcoming you across the finish line!

Event's current local time: 1:45 AM PT