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Routes
Bike touring routes & trails
United States
Colorado
San Juan County
Silverton

Eureka loop

Moderate

3.3

(9)

68

riders

Eureka loop

01:38

22.4km

200m

Cycling

Embark on the Eureka loop, a moderate touring bicycle route that takes you through the scenic San Juan National Forest. This 13.9-mile (22.4 km) journey involves a manageable 650 feet (198 metres) of elevation gain, typically completed in about 1 hour and 37 minutes. As you pedal, you will trace…

Last updated: April 23, 2026

Waypoints

A

Start point

Parking

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1

960 m

Silverton

Highlight • Settlement

The small town of Silverton is an easy hitch from Molas Pass/Campground if you hike the Continental Divide or Colorado Trail. There is also an alternate route that leads you …

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2

14.3 km

Animas River

Highlight • River

The Animas River flows through the picturesque town of Silverton, Colorado, offering a scenic backdrop to the charming mountain community. As it meanders through the town, the crystal-clear waters are popular for fishing and recreational activities.

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B

22.4 km

End point

Parking

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Way Types & Surfaces

Way Types

18.6 km

3.68 km

158 m

Surfaces

8.51 km

6.79 km

6.62 km

476 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

Friday 8 May

14°C

-2°C

0 %

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Max wind speed: 14.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Is the Eureka loop suitable for beginner touring cyclists?

Yes, the section of the Eureka loop from Silverton to the historic Eureka Mine is considered very easy for beginners. It's a dirt road that is generally accessible to passenger cars, making it suitable for touring bikes, especially those with wider tires or gravel capabilities. Beyond Eureka, the route becomes much more challenging and is primarily for high-clearance 4x4 vehicles.

What is the terrain like on this touring bicycle route?

The terrain from Silverton to Eureka is primarily a dirt road, described as mildly rocky but fairly wide. It follows the Animas River. While generally easy, it's best suited for touring bikes equipped for varied surfaces, such as those with wider tires or gravel capabilities.

What scenic views or historical sites can I expect along the route?

You can expect spectacular natural beauty, including stunning mountain views and waterfalls. The route follows the Animas River. Historically, you'll pass old abandoned mines and ghost towns like Eureka and Sunnyside Mill, offering a glimpse into the area's rich mining past.

What wildlife might I see on the trail?

As you cycle along the Animas River, you might spot various wildlife such as deer, marmots, and large birds of prey. The San Juan Mountains are home to diverse animal species.

Where can I park to access the Eureka loop?

The Eureka loop typically starts near Silverton, Colorado. Parking is generally available within or near Silverton, which serves as a gateway to the San Juan Mountains. Specific parking areas may vary, so it's advisable to check local signage upon arrival.

What is the best time of year to cycle the Eureka loop?

The best time to cycle this route is generally during the warmer months. September is particularly picturesque when the aspen trees in the San Juan Mountains change color, offering stunning fall foliage views.

Are dogs allowed on the Eureka loop?

As this route is largely on County Roads within the San Juan National Forest, dogs are generally permitted. However, they should always be kept under control, preferably on a leash, to protect wildlife and ensure a pleasant experience for all users. Please practice Leave No Trace principles.

Do I need any permits or pay entrance fees for this trail?

The Eureka loop is located within the San Juan National Forest. Generally, there are no specific permits or entrance fees required for day-use cycling on the county roads that make up this route. However, always check the latest regulations from the US Forest Service for any updates or specific requirements for certain activities or areas within the National Forest.

Does the Eureka loop connect with other cycling routes?

Yes, the route utilizes sections of several local roads and trails. You will encounter parts of County Road 22, County Road 21, and County Road 23 (Maggie Gulch Road). It also briefly intersects with the Hardrock 100 Route, Lackawanna Road, and Boulder Gulch Trail.

How does the Eureka loop compare to the full Alpine Loop for cycling?

The Eureka loop, specifically the Silverton to Eureka section, is a much more accessible and easier cycling experience compared to the full Alpine Loop. The broader Alpine Loop is renowned for 4x4 enthusiasts and features rugged, high-clearance terrain largely unsuitable for standard touring bicycles beyond Eureka. This route offers a taste of the scenic San Juan Mountains without the extreme technical demands of the full Alpine Loop.

What amenities are available near the Eureka loop?

The town of Silverton, where the loop typically begins, offers various amenities. You can find cafes, pubs, restaurants, and accommodation options there. It's a good place to stock up on supplies before heading out on your ride.

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