Mountain Lakes 100

One of the country’s most beautiful 100-milers

Sep 21st–22nd

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Registration closes Sep 1st

Race Details

Oregon’s Best 100 Miler

This truly is the most beautiful Oregon 100 miler. The course is on the iconic Pacific Crest Trail and features the best trail running the Pacific Northwest has to offer – technical and rocky sections, lots of views of mountain peaks and lakes, and plenty of luscious of single track. You’ll run between two Cascade mountains; Mt. Jefferson and Mt. Hood, and experience outstanding on-course support while making the journey to the finish line. There is 11,700′ of gain and loss at Mountain Lakes 100.

Check out the Course page for the route.

Race Fee:

We had to raise our prices by $20 this year, but are still priced quite a bit lower than other Oregon hundreds.

$330 (Jan 6 – 19, 2024)
$340 (Jan 20 – Mar 19)
$350 (Mar 20- Sep 1)

The above is only Go Beyond Racing’s registration fee and does not include Ultrasignup’s processing fees, any taxes, or add-ons you select. Those are included in the prices on the Ultrasignup site.

Get on the Wait List

2024 is NOT a lottery. Capacity is 150.

Please note that there are no transfers to other runners and no refunds. 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. If your cancellation is 30 days or less from race day, there is no credit. By registering, you agree to this Cancellation Policy.

Do you want to race but can’t afford the entry fee? We can help with our Trail Mix Fund.


  • Race Date: September 21-22, 2024
  • Start Time/Race Location:  8:00 am at Olallie Lake Resort
  • Time Limit: 30 hours

Please note that there are no transfers to other runners. 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. If your cancellation is 30 days or less from race day, there is no credit, no refund, or no transfer.  See our cancellation policy for details.

Runners on Pacific Crest Trail at Mountain Lakes 100, the prettiest Oregon 100 miler.

Race Schedule

Friday, Sept. 20

  • Pasta feed: 5:00-7:00 p.m.  Free for racers. Family and crew can purchase dinner for $7 cash
  • Bib pickup: 5:00-7:00 p.m. (photo ID required)

Saturday, Sept. 21

  • Bib pickup/Check in: 6:00 – 7:30 a.m. (Photo ID required. All racers must check in on race morning, even if you picked up your bib the night before)
  • Race briefing: 7:45 a.m.
  • Race Start: 8:00 a.m.
  • Crew Briefing: 8:15 a.m.

Sunday, Sept. 22

  • Breakfast: 8:00 a.m. Free for racers and up to three crew. Family and others can purchase breakfast for $5 cash
  • Awards: 10:00 a.m.
  • Race Ends: 2:00 p.m.

Trail Work Requirement

As trail runners, we benefit from the work of those who built and maintain the trails where we run. Many of the organizations and groups who do this work have little and shrinking budgets and rely heavily on volunteers. We strongly believe that all of us should give back by volunteering to do trail work on a regular basis.

All racers (those entered and those on the wait list) must complete a total of eight (8) hours of trail work. The trail work doesn’t need to be done before registering; just sometime after October 1 and by September 1. The required form is signed by the trail work site manager and emailed (to the address on the form) before the deadline. Entrants and waitlisters without the required trail work will forfeit their spot on September 2nd and the next on the wait list is invited to take the place.

We define trail work as maintenance of existing trails and development of new. Picking up garbage does not count. The trails can be anywhere in the world. More details on the requirement are in this post.

Go Beyond Racing hosts several trail work events throughout the year – check our Events Calendar for those. We will also post opportunities we hear of in the Mountain Lakes 100 Facebook Group.

This report shows all current entrants and notes those who have completed all 8 hours. Waitlisters won’t show on this report until they are actually in the race, even if you’ve submitted your hours.


The top three male and female finishers will receive prizes from our sponsors. We give out age group and non-binary awards as well. And there are many raffle prizes.  All finishers will receive a belt buckle and a finisher pint glass. Those who finish under 24-hours earn a special buckle.

Post-Race Festivities

The all-you-can-eat breakfast (mmm, bacon) is free for all volunteers, racers and up to three of their crew. Families and friends can purchase a meal for $5.  We hope everyone sticks around to cheer in racers well enjoying breakfast!


The weather in the northwest in September is usually fairly stable with cool, clear days. The temperatures can drop to the 30s during the nighttime. However, as with any mountain race, the weather can be unpredictable so pack accordingly and check the weather before you leave. Here’s a link to the weather forecast for Olallie Lake and one for Timothy Lake.


Ollalie Lake Resort has rustic cabins, a few yurts and some campgrounds available. Some of the campgrounds have not reopened after the fires. Camping at the Paul Dennis and Olallie Meadows campgrounds is first-come, first-served. There is NO car camping (meaning sleeping in or beside your car) in the parking lots at Olallie Lake.

There are also campgrounds around Timothy Lake. We recommend using to find and reserve.

Government Camp is just 20 miles from Timothy Lake and has lodging also.

The small town of Detroit Lake is much rebuilt after the 2020 fires and has rentals on Airbnb. Note the driving directions below about not using road 4220 from Detroit to get to the race.

Directions to Olallie Lake Resort

Ollalie Lake Resort  (44°48’50.5″N 121°47’24.7″W) is 99 miles southeast of the Portland Airport.

Recommended Route from Portland – Via Estacada
Take Hwy 211/224 south. Continue on Forest Road 46 for 14.8 miles. Left onto FR 42 and go 4.3 miles. Right onto 4230 for 2.7 miles. Right onto 4220 for 9.1 miles.

This route is about 2 hours and 23 minutes from Portland, through Estacada and involves less gravel roads.

Google Map from Estacada

From Portland via Government Camp
Take Hwy 26 towards Mt Hood, drive past Government Camp and continue ten miles past the Hwy 35/Hwy 26 intersection to Forest Road 42 (also marked as Skyline Rd and Timothy Lake). The Forest Road 42 turnoff is close to the 66-mile mark on Hwy 26. Follow Forest Roads 42 to 42/200 to 4230 to 4220 (we will have signage at the intersections).

Google Map Portland to Olallie Lake Resort (via Government Camp)

Olallie Lake is about 2 hour 30 minutes from the Portland airport.

From Bend
Hwy 97 to Hwy 20. Go north on US 20 to Detroit. In Detroit, turn right onto Forest Road 46 for 23 miles. Do not take the right onto 4220 that Google Maps will tell you to (see below). Turn right onto Forest Road 4690 and go 8 miles. Turn right onto Forest Road 4220 (the other end of it, not the bad portion) and continue onto the Resort.

Google Map from Bend

NOTE: Google maps will send you up Forest Road 4220 from Detroit (into the back of Olallie Lake Resort). This road is rough and requires a high-clearance vehicle and we do not recommend this route.

Parking at Olallie Lake Resort

Parking is tight. We request that crew and pacers and spectators carpool as much as possible. There are three parking options. Please utilize these only as designated. There are two “lots” we will use at the Resort, and parking alongside the road north of the aid station. Crew and spectators should be prepared to walk a bit to get to the action.

  1. Short-term parking is in the lot right next to the store. This is for vehicles arriving race morning and then leaving after the start, or arriving mid-race and staying for an hour. Only park here if you’ll be at the start/finish area for one hour or less.
  2. Long-term parking is in the lot north of the store. This is for runners to park who will be leaving their vehicle for the duration of the race. It is a small lot, so park tightly. No RVs or trailers. There is no overnight parking here – this is for cars arriving for the pasta feed Friday and then leaving that evening, and for cars arriving race morning only. Again, no overnight parking the night before the race.
  3. Road parking is available north of the junction where the aid station is set up and on the northbound (east) side of road 4220 only. This means do not park on the southbound (west) side. Large vehicles with trailers, including fire trucks, have to be able to get through. There is no parking south of the aid station as the road is not wide enough to accommodate parking and traffic.

Please follow these directions. Make sure your crew knows too. The volunteers and race organizers will be busy doing more important things to support the runners than policing the parking areas and no one really enjoys those conversations when someone parks where they’ve been told they aren’t allowed.

Directions to Historic Clackamas Ranger Station

Clackamas Lake Historic Ranger Station, near Timothy Lake, is approximately 20 miles south of Mt. Hood. (45.0986, -121.7513)

From Portland, take Hwy 26 towards Mt Hood, drive past Government Camp and continue ten miles past the Hwy 35/Hwy 26 intersection to Hwy 42 (also marked as Skyline Rd and Timothy Lake). The Hwy 42 turnoff is close to the 66-mile mark on Hwy 26. The Clackamas Ranger Station is 10 miles down Hwy 42, 1/4 mile past Hwy 42/Hwy 57 intersection on Hwy 42.

Clackamas Ranger Station is about 1 hour 45 minutes from the Portland airport.

Google Map for Clackamas Ranger Station.

Parking at Historic Clackamas Ranger Station

Parking is allowed on the side of the road on portions of Forest Service Road 42 (FS42) south of the Clackamas Lake Historic Ranger Compound.  No parking is allowed on on either side of FS42 at the Pacific Crest Trailhead adjacent to Joe Graham Campground.  No parking is allowed on either side of FS42 from the event entrance north to Joe Graham Campground.


If you are interested in carpooling, you can post here to find or give a ride. This is a Google spreadsheet that is viewable to anyone with the link, so only post what you want public. Carpooling can earn you $5 cash and a $5 drink gift card from Nossa Familia Coffee – read about this new program here.


We love volunteers and our racers do too! To make this race a success we need almost 100 people to help at bib pickups, race start and finish, aid stations, and on the trail. Click on the Register button on this page and then the green Volunteer button on Ultrasignup. HAM radio volunteers can sign up here.

100 Miles in the Oregon Mountains

This race is called Mountain Lakes 100 because… it is in the mountains. It has some pretty remote sections. There is very little internet or cell service along the course or at the start/finish area. The closest “town” is Government Camp about 20 miles away. There are no showers. Please come prepared with this in mind. In fact, consider this a nice weekend away from the city in all senses. The lowest point is at 3,300 feet elevation and the high point on the course is at 5,700 feet.


We do have a few rules that apply to all Go Beyond Racing races. Be sure you are familiar with them.


Need help getting ready for this race? Talk to our friends at Wy’east Wolfpack. They provide excellent coaching and training services.

Western States 100 Qualifier


We have a vibrant community on our Mountain Lakes 100 Facebook Group. Join to learn from those who have run before, connect with runners, find pacers, etc.

Follow Go Beyond Racing on Facebook and on Instagram to stay inspired.


  • This event is located on the National Forest.
  • You will be running on a multi-use trail and horses may be encountered. Horses should be approached in a slow/calm manner for safety.
  • In accordance with Federal law and U.S. Department of Agriculture policy, this institution is prohibited from discriminating on the basis of race, color, national origin, sex, age or disability. To file a complaint of discrimination, write USDA, Director, Office of Civil Rights, Room 326-W, Whitten Building, 1400 Independence Avenue, SW, Washington, D.C. 20250-9410 or call (202) 720-5964 (voice and TDD). USDA is an equal opportunity provider and employer.



We acknowledge that this race occurs on the traditional homelands of the Molalla Tribe, Tenino Tribe, and the Confederated Tribes of the Warm Springs.