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Running trails & routes
United States
Oregon
Washington County

Bumping Knots Loop

Moderate

4.7

(2165)

5,544

runners

Bumping Knots Loop

01:12

10.4km

270m

Running

Jog the Bumping Knots Loop, a moderate 6.5-mile trail in L.L. Stub Stewart State Park with forest views and an old train trestle.

Last updated: February 26, 2026

Waypoints

A

Start point

Parking

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1

849 m

Forest Trail in L.L. Stub Stewart State Park

Highlight • Trail

Just 34 miles west of Portland is a super good outdoor heaven. Set on a cool forested hillside, LL Stub Stewart State Park offers a great variety of camping and …

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2

4.33 km

Bumping Knots Loop

Highlight (Segment) • Trail

Bumping Knots is one of the longer trails in the park. It is a 6-mile lollipop loop that traces an old logging road along a length of Williams Creek. After …

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B

10.4 km

End point

Parking

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Way Types & Surfaces

Way Types

7.97 km

1.78 km

331 m

314 m

Surfaces

9.96 km

331 m

105 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

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Today

Tuesday 19 May

18°C

6°C

39 %

Additional weather tips

Max wind speed: 17.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it typically take to jog this loop?

Komoot estimates the Bumping Knots Loop takes approximately 1 hour and 11 minutes to complete for jogging. However, this can vary based on your fitness level and how often you stop to enjoy the scenery.

What is the terrain like on the Bumping Knots Loop?

The trail offers a varied experience, combining sections of old logging roads with purpose-built singletrack. You'll encounter dirt paths, some smooth rolling sections, and significant elevation changes with steep climbs and descents. Be prepared for potentially muddy conditions, especially during the rainy season, which can make some parts challenging for running shoes.

Is this trail suitable for beginner joggers?

While rated as 'moderate' for running, the Bumping Knots Loop can be quite challenging due to its varied terrain and elevation changes. It's described as having 'lung-busting' climbs. Beginners with good fitness might manage, but those new to trail jogging should be prepared for a strenuous workout.

Are dogs allowed on the trail?

Yes, dogs are generally allowed in L.L. Stub Stewart State Park, but they must be kept on a leash. Always check the latest park regulations before your visit.

What are the parking options for the trailhead?

The Bumping Knots Loop is located within L.L. Stub Stewart State Park. Parking is available at various trailheads within the park. You'll want to find parking that provides direct access to the loop.

Are there any fees or permits required to access L.L. Stub Stewart State Park?

Yes, L.L. Stub Stewart State Park typically requires a day-use parking fee or a valid Oregon State Parks Pass. Always check the official Oregon State Parks website for the most current fee information and regulations before you go.

What kind of scenery and landmarks can I expect to see?

The loop winds through a shaded forest rich with ferns and wildflowers. You'll trace along Williams Creek for a portion and climb to a ridge offering occasional eastward views across the park valley. A notable historical feature is an old wooden train trestle along the route. You'll also pass through the Forest Trail in L.L. Stub Stewart State Park and the Bumping Knots Loop itself.

When is the best time of year to jog this route?

The trail can be enjoyed year-round, but conditions vary. Spring brings wildflowers, while fall offers vibrant foliage. Be aware that during the rainy season (e.g., February), the trail can become very muddy, making it less ideal for jogging shoes. Summer offers drier conditions, but always be prepared for potential mud in shaded or low-lying areas.

Does the loop connect with other trails in the park?

Yes, the Bumping Knots Loop is part of an extensive network of trails within L.L. Stub Stewart State Park. The route also passes through sections of the Banks-Vernonia Trail, the Tualatin Valley Scenic Bikeway, the Salmonberry Trail, Hollies Point of View Trail, and the Timber Beast Trail.

What should I wear or bring for a jog on this trail?

Given the varied terrain and potential for mud, sturdy trail running shoes with good grip are recommended. Dress in layers, as the forest can be shaded and temperatures can fluctuate. Bring plenty of water, especially on warmer days, and consider a small backpack for essentials like snacks, a map, and a first-aid kit.

Are there any specific challenges or insider tips for jogging this loop?

One insider tip is to be mindful of the multi-use nature of the trail; you might encounter hikers and equestrians. Some lowland sections can be 'choppy and torn up from hooves,' so watch your footing. Also, be prepared for significant elevation changes, as the trail offers a 'roller-coaster romp' feel that provides a good workout.

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