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Routes
Running trails & routes
United States
Oregon
Clatsop County
Seaside

Clark's Mountain Loop via Lewis and Clark Discovery Trail

Routes
Running trails & routes
United States
Oregon
Clatsop County
Seaside

Clark's Mountain Loop via Lewis and Clark Discovery Trail

Hard

3.2

(15)

62

runners

Clark's Mountain Loop via Lewis and Clark Discovery Trail

02:18

15.9km

690m

Running

Embark on the challenging Clark's Mountain Loop via Lewis and Clark Discovery Trail, a difficult jogging route that spans 9.9 miles (15.9 km) and climbs a significant 2253 feet (687 metres). As you ascend, you'll experience diverse terrain, from dense old-growth Sitka Spruce forests to grassy dunes and transitional wetlands.…

Last updated: April 23, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

Lewis and Clark National Historical Park

Waypoints

A

Start point

Parking

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1

27 m

Tillamook Head Trailhead

Highlight • Trail

There is helpful information regarding the trail's history, and the arched entrance gives you the feeling of entering your own personal, magical coastal forest. If you want to avoid the …

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2

6.04 km

Clatsop Loop Trail

Highlight (Segment) • Trail

The Clatsop Loop Trail is a runner's delight as it winds through the stunning coastal rainforest, offering breathtaking ocean views and serene forest landscapes. The path is well-maintained, with challenging …

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B

15.9 km

End point

Parking

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Way Types & Surfaces

Way Types

15.9 km

< 100 m

Surfaces

12.0 km

3.85 km

< 100 m

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Elevation

Elevation

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Highest point (350 m)

Lowest point (20 m)

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Weather

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Monday 25 May

13°C

9°C

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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 the Clark's Mountain Loop?

Komoot estimates the average jogging time for this 15.9 km loop to be around 2 hours and 18 minutes. However, given its difficult rating and significant elevation gain, individual times may vary based on fitness level and trail conditions.

Is this trail suitable for beginner joggers?

No, the Clark's Mountain Loop is rated as difficult and features substantial elevation changes, including a climb of approximately 411 meters (1,350 feet) to the summit of Clark's Mountain. It's best suited for experienced trail runners with good fitness and sure-footedness, rather than casual or beginner joggers.

What are the parking options for accessing this trail?

The trail can be accessed from Ecola State Park. A common starting point is the Tillamook Head Trailhead within the park. Parking is available, but Ecola State Park requires a day-use fee or a valid Oregon State Parks Pass.

What is the terrain like on the Clark's Mountain Loop?

The terrain is varied and challenging. While some parts of the broader Lewis and Clark Discovery Trail might be paved, the section leading up Clark's Mountain is a natural trail. Expect steep sections, numerous switchbacks, dirt, roots, and potentially muddy or slippery areas, especially after rain. Proper footwear is essential.

What kind of views can I expect along the way?

This loop offers stunning coastal beauty. You'll be treated to panoramic views of the Pacific Ocean, glimpses of the Terrible Tilly Lighthouse, Cannon Beach, and the expanse of Seaside, Oregon. The trail also winds through dense forest groves of old-growth Sitka Spruce and offers views of grassy dunes and transitional wetlands.

Does this route connect with other well-known trails?

Yes, the Clark's Mountain Loop is part of a larger network. The route follows sections of the Oregon Coast Trail, the Lewis and Clark Discovery Trail - Oregon Coast Trail, and the Clatsop Loop Trail. It also briefly touches upon the Tillamook Rock Lighthouse Trail and Indian Beach Trail.

Is the Clark's Mountain Loop dog-friendly?

Dogs are generally allowed on trails within Ecola State Park, but they must be kept on a leash. Always check current park regulations before your visit, as rules can change.

Are there any permits or fees required to access this area?

Yes, as the trail is located within Ecola State Park, a day-use fee is required for vehicle entry. You can purchase a day pass at the park entrance or use an Oregon State Parks Pass.

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

The Oregon coast weather can be unpredictable. Late spring through early fall (May to October) generally offers the most favorable conditions with less rain and milder temperatures. However, be prepared for potential fog or rain at any time. Winter can be very wet and muddy, making the already challenging terrain even more difficult.

What notable features or landmarks will I see on the trail?

Beyond the natural beauty, the trail is rich in history. You'll encounter bronze sculptures commemorating the Lewis and Clark Expedition, particularly Captain William Clark's journey through Tillamook Head. The summit of Clark's Mountain itself is a significant landmark, offering expansive views.

What should I bring for jogging this challenging loop?

Given the trail's difficulty and varied terrain, we recommend bringing sturdy trail running shoes with good grip, plenty of water, layers of clothing to adapt to changing weather, and navigation tools (like the komoot app) as cell service can be spotty. Trekking poles can also be helpful for the steep sections.

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