Overview
Mountain Lakes 100 is one of the country’s most scenic and well-supported 100-mile races. This classic Oregon ultra showcases the best of the Pacific Northwest: stunning alpine lakes, old-growth forests, and dramatic views of Mt. Hood and Mt. Jefferson. With over 60 miles of the iconic Pacific Crest Trail, this race combines beauty with a true endurance challenge.
Known for its exceptional volunteer support and welcoming community, Mountain Lakes 100 offers runners an unforgettable experience along technical, rocky trails and serene mountain lakes, all under a canopy of towering evergreens.
Saturday, September 20, 2025
Registration
Opens
TBD
Closes
TBD
Registration Fee
Western States Qualifier
Official race details:
Course
Distance:
100
M
Course type:
Point-to-point
Elevation gain:
▲
11,700 ft
Elevation loss:
▼
11,700 ft
Max altitude:
5,700 ft
Start time:
Sep 20, 2025
Cutoff time:
30HR
Course Description
The course follows the iconic Pacific Crest Trail, weaving between Mt. Jefferson and Mt. Hood. Expect long stretches of buttery single track, technical rocky sections that keep you honest, and panoramic views that will stop you in your tracks. You’ll skirt alpine lakes, climb through lush forests, and tackle challenging climbs and descents as you push toward the finish line.
Key Highlights
100-mile loop through Oregon’s Cascade Range
~11,700 ft of elevation gain and loss
Mostly single-track on the Pacific Crest Trail (60+ miles)
Technical terrain with rocky sections, rooty paths, and remote wilderness
High alpine lakes, lush forest, and stunning mountain views
Lowest point is ~3,300 ft; highest point is ~5,700 ft
Starts and finishes at Olallie Lake Resort
Logistics
Portland International Airport is 99 miles from the race start and approximately a 2.5-hour drive. Bend is another gateway city with nearby lodging and airport access.
Driving Directions
Parking
Parking is limited. Long-term and short-term options are available near Olallie Lake Resort, with overflow road parking north of the aid station. Carpooling is required for crew and visitors. No overnight parking is allowed.
Lodging
Olallie Lake Resort offers rustic cabins and yurts. Nearby campgrounds include Paul Dennis and Olallie Meadows (first-come, first-served). Timothy Lake and Detroit Lake also offer camping and rental options. Government Camp has lodging 20 miles away.
Aid Stations
Runners will encounter fully stocked aid stations along the course with water, electrolyte drinks, and a wide variety of food. Some stations accept drop bags. HAM radio support is on-site for communication.
Race Requirements
Runners must be prepared for remote conditions, variable mountain weather, and long unsupported stretches between aid stations. Prior ultramarathon experience is strongly recommended.
Trail Work
All entrants must complete 8 hours of trail work between October 1, 2024, and September 1, 2025. Work may be completed anywhere in the world and must be signed off by a trail work supervisor. Proof must be submitted to organizers.
Qualifying Races
Runners must demonstrate experience at ultramarathon distances.
Mandatory Gear
Runners should be prepared with weather-appropriate gear, including nighttime layers and hydration systems.
Policies
Cancelations & Deferrals
Cancel more than 30 days before; get 50 percent future race credit (valid 365 days, includes full apparel credit, not transferrable). Cancel 30 days or less before; no credit, no refund, no transfer. See race website for full cancelation policy
Crew, Pacers & Spectators
Crew and spectators are welcome but must follow parking and access guidelines. Carpooling is strongly encouraged due to limited space. Visitors should be prepared for remote conditions and limited amenities.
Volunteers
Volunteers are the heart of this race. Opportunities include working aid stations, sleep stations, and supporting logistics. Sign up at gobeyondracing.com/volunteer.
Charity & Beneficiary
Proceeds support trail maintenance groups that keep the Pacific Crest Trail and surrounding wilderness open and safe.
Land Acknowledgement
We acknowledge that Mountain Lakes 100 takes place on the traditional homelands of the Molalla Tribe, the Tenino Tribe, and the Confederated Tribes of Warm Springs. We honor and respect their enduring connection to this land.
About
Go Beyond Racing
Founded in 2013 and based in Portland, Oregon, Go Beyond Racing is a premier trail race organizer that has become a pillar of the Pacific Northwest trail running community. Known for its professional execution and welcoming culture, Go Beyond produces dozens of races annually—from grassroots weeknight trail series to 200-mile endurance feats—each designed to challenge and inspire runners of all backgrounds.
At the core of Go Beyond Racing is a commitment to going the extra mile. Every event is intentionally crafted to reflect their core values.
Race directors Todd and Renee Janssen are lifelong endurance athletes and deeply embedded in the trail community. Their family-oriented approach and hands-on involvement ensure each event feels personal and thoughtfully executed. From their signature events like Mountain Lakes 100, Volcanic, Stumptown Trail Runs, and the Oregon 200, to weekly runs hosted through the Trail Factor club, Go Beyond is deeply invested in building a vibrant and supportive trail running culture.
Whether you're taking on your first 5K or your fifth 100-miler, Go Beyond Racing invites runners to go faster, go farther—and most importantly—go beyond.
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