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O’Leary Landslide Loop

5 Star Route / ~ Eugene, Oregon / Published: Aug 2016 / Updated: Jun 2025 / Directions
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Cyclist on Horse Creek Road, McKenzie Bridge, Oregon
Beginning of the climb. Deep forest.
Hike a bike near Cougar Reservoir, Oregon
The "hike a bike!
Two cyclists riding old mixed surface road by land slides in Oregon
Between two landslides, the road is moss covered. Really cool!
Two bicyclists riding overgrown and decrepid tarmac near Cougar Reservoir
Sometimes the road feels more like a trail.
Rockfall on mixed surface gravel ride, Oregon
Watch for rockfall!!
Cyclist navigating abandoned gravel route near McKenzie Bridge, Oregon
Higher into the climb.
Old tarmac road deteriorating into a fine gravel cycling route
Views after gravel grinder climb over McKenzie River, Oregon
Big views!
Cyclist on ridge near McKenzie River, Oregon
Views from the top, along the ridge.
Cyclists descending gravel near Cougar Reservoir, Oregon
Beginning of the descent.
Cyclists on forest gravel descent near Cougar Reservoir, Oregon
Still descending!
Cyclists swimming in Cougar Reservoir after gravel descent
At the end of the descent, go for a swim.
Convenient swimming along boat ramp on gravel grinder Cougar Reservoir Oregon
Get to the water at the boat ramp.
Gravel route crosses Cougar Reservoir dam
Crossing the dam at Cougar Reservoir.
Belknap or McKenzie River Covered Bridge
Belknap covered bridge.
Amazing!
*
Route:
Loop | 56 mi
*
Gain:
5,500 ft
*
Surface:
45% gravel road, 10% trail, 15% Roubaix, 30% paved
*
Technical Difficulty:
Moderate
*
Max Gradient:
+12% / -10%
*
Sustained Gradient:
7% over 9.5 miles
*
Climb Ratio:
1.0
*
Effort:
4 (out of 5)
*
Navigation:
Attention Required
*
Locale:
Extremely Remote
*
Tire Suggestion:
45 mm+
*
Options:
Shorter

A big climb! Beautiful views! And one of the best gravel descents in the region! One of Gravel Girl’s Favorite rides. But you need to bring your Tom Sawyer spirit as the route requires navigating through several old landslides. And after a long climb and a long downhill, you get to go swimming at the reservoir.

—

This is a 5-star route from start to finish—but due to limited funding, some elements of the ride guide may be incomplete, such as detailed points of interest, ride photos, a route video, or a “Love Where You Ride” feature.

Also, in June 2025, the Dirty Roads crew spent over 65 volunteer hours improving this route. That effort—covering fuel, chains, transportation, and more—cost over $500 and was entirely funded by rider donations.

If you’ve already donated to Dirty Freehub, thank you—you make this work possible. If not, we invite you to support our mission. Your contribution helps us create, maintain, and steward high-quality, free route guides for the gravel cycling community.

Read More
Map
Brown = gravel / dirt road
Blue = single track
Red = paved road
Purple = paved bike path
GPX Download   Version 1.0
Ride Details

When We Like to Ride This

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Not Rideable
Possibly Rideable
Rideable

We really like this route late spring / early summer when the flowers are in bloom and the creeks and rivers are running full. Note, this route tops out at just over 5000 feet, with a significant amount on north facing slopes. Thus, it carries snow well into late spring.

Terrain & Riding

The Ride
After a short warm-up, the ride attacks a demanding and majestic climb of 3500 feet in 10 miles. For 6 of those 10 miles the grade is always between 6 to 12 %. The ride surface varies from light chip seal to short sections of gravel, to a decommissioned road more resembling a trail (the 10% trail), and broken tarmac (the Roubaix). Expect occasional rockfall and fallen trees. You will also have to “hike a bike” for about across several old landslides.

The higher you climb, the better the views become. In fact we would say, this route has some of the best, if not the best, views of the Cascades from the est.

At ~ mile 17 you leave the pavement behind. At times the gravel is course and deep, but it is mostly fine and fast. The ride rolls for several miles and then begins a nearly 10-mile descent, all on gravel, to Cougar Reservoir. At the bottom of the descent veer right ~20 yards to the boat ramp and go for a swim. Now traverse around the reservoir in a clockwise direction taking in all its beauty. Then a quick descent down to Belknap covered bridge and the McKenzie River. Your almost home!

The Terrain
The terrain is characterized by dense, moist coniferous forests, steep slopes, volcanic features, and alpine meadows, creeks and rivers. Mountain hemlock and Douglas-fir dominate with an understory of rhododendron, vine maples, grasses and sedges. Seasonal wildflowers include lupine, paintbrush, and penstemon.

The Start

Lat / Long: 44.174708, -122.163775

At the McKenzie Bridge General Store. Portable toilets, no water. An alternative is to park at the McKenzie River Ranger Station, 2 miles east on Highway 126 where there are flush toilets and water.

Food & Water

  • ~ Mile 38.5: Slide Creek Campground
Notes & Options

Route Notes

  1. We recommend riding this route (and all options in the direction as mapped, clockwise). It gives the best views of the Cascades and it makes the climbing a bit easier.

Route Options

Shorter

(1) Swimming Hole Bailout. At mile 33.5, at the swimming hole, you can go right and circumnavigate the lake to the east and reconnect with the original route at mile 46. Use Forest Service road 1993. 45 miles / 5000 feet of gain.

(2) Horse Creek Option. At mile 18 go left instead of continuing straight. This option will descend a steep gravel road (gradients up to 12%) and then parallel Horse Creek. 32 miles / 4000 feet.

  • Route: O’Leary Landslide Loop (Horse Creek Option)
  • GPX File: Download
Comments

Have you ridden this route? Got a question? Join the discussion!

Help Make this Guide Better!

We really need new pictures of this ride! Send us your best.

We are looking for 20 to 30 high resolution pictures that capture the essence of the ride — the riding, the trees, the flowers, the creeks, and the reservoir. We need the pictures in 4:3 landscape mode. And … if you are a videographer, we would be excited to have a 2 to 3 minute video of your ride experience. (Maybe we should develop a Dirty Media group?? Hmmm!)

Send them to info@DirtyFreehub.org

Keep it Local! Learn More

McKenzie General Store

McKenzie General Store

Five of us stopped in here after a 7 hour day of clearing brush and trees on the route. OMG! The food and drink were so good. They have really upped there game here in the last several years. Go! Spend some money locally with good people.

Outfitters

Horse Creek Lodge

Horse Creek Lodge & Outfitters

This is our go to outfitter in the area. Whether you’re looking for camping or lodging, shuttle services, or guided rafting trips, they’ve got you covered. Owned by Gary and Alyssa Brownlee since February 2011, this locally loved outfitter is run by passionate outdoor enthusiasts and seasoned rafting guides. Need tips or insights about the McKenzie River Valley? The Brownlees are your go-to experts.

Ridden and Reviewed by:

KevinE

KevinE / Team Dirty Freehub

He should have “Never Stop Exploring” tattooed on his chest! He loves adventures on bikes and is a Co-Founder of Dirty Freehub.

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