The best road cycling routes in San Juan National Forest

By Fede from komoot

Updated May 11, 2026

If you've ever tried to plan road cycling in San Juan National Forest, you know how overwhelming the options can be. With so many roads winding through dramatic landscapes, it's tough to figure out which routes are genuinely worth your time and effort, and which are just filler. We get it, and we're here to help.

That's where we come in. Our komoot community has mapped, ridden, and reviewed countless routes here, so we've done the legwork to bring you a curated shortlist of the very best. Consider this your shortcut to an incredible ride, saving you the guesswork and pointing you straight to the experiences that truly deliver.

Road cycling in San Juan National Forest is defined by its dramatic mountains, lush forests, and picturesque rivers. You'll find everything from challenging mountain passes with significant elevation gain to more accessible paved sections, all set against a backdrop of stunning high-elevation views. The best time to hit these roads is generally from late spring through early fall, when the mountain passes are clear of snow and conditions are more stable.

If you only do one ride, make it Hermosa to Coal Bank Pass. This difficult 51.1-mile (82.3 km) route offers an incredible payoff with alpine views and a significant climb that's absolutely worth your legs. For a slightly less demanding but still rewarding experience, the Animas River Trail – Lemon Reservoir loop from Hermosa Creek is a moderate 53.7-mile (86.8 km) path that mixes paved sections with some elevation. With over 750 road cyclists already exploring this region with komoot, you're in good company. Dive in and discover your next favorite ride!

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Compare these routes at a glance

Trail	Distance	Elevation	Difficulty
Hermosa to Coal Bank Pass	82.3 km	1,440 m	Hard
Falls Creek Road	14.6 km	130 m	Easy
Oxbow Park and Preserve – Animas River and Rotary Park loop from Trimble	35.1 km	160 m	Easy
Animas River Trail – Lemon Reservoir loop from Hermosa Creek	86.8 km	830 m	Moderate
Purgatory Trailhead loop from Trimble	68.6 km	900 m	Hard

Trail

Distance

Elevation

Difficulty

Hermosa to Coal Bank Pass

82.3 km

1,440 m

Hard

Falls Creek Road

14.6 km

130 m

Easy

Oxbow Park and Preserve – Animas River and Rotary Park loop from Trimble

35.1 km

160 m

Easy

Animas River Trail – Lemon Reservoir loop from Hermosa Creek

86.8 km

830 m

Moderate

Purgatory Trailhead loop from Trimble

68.6 km

900 m

Hard

1. Hermosa to Coal Bank Pass

82.3km

04:14

1,440m

The Hermosa to Coal Bank Pass road cycling route plunges you into the heart of the San Juan National Forest, offering a spectacular journey through rugged mountain scenery. As you climb, you'll be treated to expansive alpine vistas and views of the Hermosa Cliffs, all while traversing a segment of the world-renowned Million Dollar Highway. The experience is one of sustained effort rewarded by breathtaking natural beauty, culminating at the high-altitude Coal Bank Pass.

This difficult 51.1-mile (82.3 km) ride demands good to very good fitness, with 4726 feet (1441 metres) of elevation gain over an estimated 4 hours and 14 minutes. Be prepared for significant climbing, especially as you approach Coal Bank Pass where grades can reach 7% to 8%. While the road is mostly well-paved, some sections might be unpaved or more challenging, so ensure your bike is ready for varied conditions.

This route is a key section of the legendary Durango to Silverton ride and forms part of the annual Iron Horse Bicycle Classic, making it a bucket-list experience for many cyclists. It offers a true high-mountain touring cycling experience in Colorado, reaching Coal Bank Pass at over 10,600 feet. The dramatic landscapes and jagged peaks have earned this region the nickname "American Alps."

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2. Falls Creek Road

14.6km

00:38

130m

The Falls Creek Road route offers a pleasant, easy road cycling experience in La Plata County, perfect for a quick spin. You'll pedal through the local landscape, enjoying the natural beauty of the area without any demanding climbs. This route is ideal for those seeking a relaxed pace and a chance to take in the surroundings, making it a great option for a casual outing or a warm-up ride.

Planning your visit is straightforward, with parking generally available near the start point. Given its easy difficulty and short duration, it's suitable for most times of day, but always check the weather forecast before you head out. Bring water, especially during warmer months, to stay hydrated on this 9.0-mile (14.6 km) journey with 434 feet (132 metres) of elevation gain, which typically takes about 38 minutes.

This route stands out as a beginner-friendly option for road cycling in the region, offering a low-commitment way to enjoy the outdoors. Unlike some of the more challenging, high-alpine routes, Falls Creek Road provides a gentle introduction to cycling in the area, making it accessible for a wide range of riders looking for a quick, enjoyable ride.

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3. Oxbow Park and Preserve – Animas River and Rotary Park loop from Trimble

35.1km

01:33

160m

The Oxbow Park and Preserve – Animas River and Rotary Park loop from Trimble offers a delightful road cycling experience along Durango's scenic Animas River. This easy 21.8-mile (35.1 km) route, with a gentle 520 feet (158 metres) of elevation gain, takes about 1 hour and 33 minutes to complete. You'll enjoy continuous river views, cycle past city parks like Rotary Park, and even parallel the historic Durango and Silverton Narrow Gauge Railroad, making it a perfect choice for a relaxed outing.

Starting from the Trimble area, this loop primarily uses the Animas River Trail, a well-maintained paved path. While bicycles aren't allowed inside the Oxbow Preserve itself, the trail provides easy access to this beautiful natural area. The route is designed for safety, with many underpasses and dedicated bridges minimizing interactions with vehicle traffic, making it a great option for families or those new to cycling.

This cycling route is a fantastic way to explore Durango's natural beauty and urban amenities. The Animas River Trail acts as the city's main cycling artery, connecting various neighborhoods, downtown, and recreational facilities. You'll find abundant wildlife along the way, and in warmer months, the river comes alive with kayakers and tubers, adding to the vibrant atmosphere of this accessible and enjoyable ride.

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4. Animas River Trail – Lemon Reservoir loop from Hermosa Creek

86.8km

04:06

830m

The Animas River Trail – Lemon Reservoir loop from Hermosa Creek offers a compelling road cycling adventure, blending urban riverfront paths with challenging mountain climbs. You'll start with continuous views of the Animas River and the historic Durango and Silverton Narrow Gauge Railroad corridor, before transitioning to the scenic San Juan Mountains. The route culminates with a significant ascent to Lemon Reservoir, providing stunning vistas of the water and surrounding natural beauty.

This moderate 53.9-mile (86.8 km) ride involves 2728 feet (831 metres) of elevation gain, taking approximately 4 hours and 6 minutes. The Animas River Trail is generally smooth, but expect a steep 3-mile climb to Lemon Dam on County Road 240, with grades sometimes exceeding 10%. Good fitness is essential for the mountain sections, and it's crucial to stay on paved roads in the Hermosa Creek area to avoid off-road trails.

This loop is notable for its diverse terrain, combining accessible city riding with the rigors of mountain road ascents, making it a standout option for road cyclists in the Durango area. It provides a unique opportunity to experience both the social, convenient aspects of the Animas River Trail and the strenuous, rewarding challenge of mountain landscapes. The blend of experiences makes it a memorable ride for those seeking variety.

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5. Purgatory Trailhead loop from Trimble

68.6km

03:29

900m

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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6. Animas River Trail – Oxbow Park and Preserve loop from Trimble

81.1km

04:26

930m

The Animas River Trail – Oxbow Park and Preserve loop from Trimble offers a long and engaging road cycling experience, tracing the scenic Animas River through Durango. You'll glide along mostly paved surfaces, enjoying continuous river views, passing through city parks, and even catching glimpses of the historic Durango & Silverton Narrow Gauge Railroad. The route provides a dynamic blend of natural beauty and urban charm, with interpretive signs and art installations adding to the journey.

This is a difficult road cycling route, covering 50.4 miles (81.1 km) with a significant 3057 feet (932 metres) of elevation gain, typically requiring about 4 hours and 26 minutes to complete. While the trail itself is well-maintained, the overall distance and climbing make it a substantial challenge. Start from Trimble and be prepared for a full day of riding; ensure you carry plenty of water and snacks, especially if you're tackling it in warmer weather.

This loop is a cornerstone of Durango's trail network, often called its "spine," connecting various amenities and attractions. Beyond the river views, you'll find easy access to places like the Powerhouse Science Museum and the Durango Botanic Gardens. The route's strategic use of underpasses and bridges minimizes road crossings, enhancing safety and providing a continuous flow for your ride, making it one of the more popular trails and routes for serious cyclists in the area.

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7. Coal Bank Pass – Molas Pass loop from Peregrine Parking

47.8km

02:58

1,310m

The Coal Bank Pass – Molas Pass loop from Peregrine Parking offers a quintessential Colorado road cycling experience, winding through the breathtaking San Juan Mountains. You'll navigate the Million Dollar Highway, where the scenery transitions from tree-lined passes to expansive mountain meadows near Molas Pass, often adorned with spectacular wildflowers in mid-summer. This difficult 29.7-mile (47.8 km) route demands respect, featuring 4287 feet (1307 metres) of elevation gain over an estimated 2 hours and 57 minutes of riding.

Planning for this high-altitude challenge is key; be prepared for rapidly changing mountain weather and carry all necessary food and water, as services are scarce between Durango Mountain and Silverton. While the route is generally well-maintained, stay vigilant for road debris. This is a ride for experienced cyclists, not beginners, due to the significant climbs and high elevations.

This loop is a segment of the famous Iron Horse Bicycle Classic, making it a bucket-list ride for many road cyclists. The route's challenging nature, combined with its unparalleled vistas, solidifies its reputation as one of the region's premier cycling destinations. Just remember that some sections lack shoulders or guardrails, adding to the adventure and requiring your full attention.

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8. Coal Bank Pass – Silverton loop from Elbert Creek Trail Parking

78.7km

04:32

1,860m

Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

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9. Coal Bank Pass loop from Durango Mountain Club

24.7km

01:35

670m

If you're looking for a road cycling route that delivers big mountain views and a solid workout, the Coal Bank Pass loop from Durango Mountain Club is a fantastic choice. This moderate 15.4-mile (24.7 km) ride packs in 2194 feet (669 metres) of elevation gain, taking you through changing terrain from tree-lined climbs to open, high-alpine vistas. You'll be treated to spectacular rugged peaks and stunning landscapes along a section of the famous Million Dollar Highway, making the 1 hour and 34 minutes of effort well worth it.

Starting from the Durango Mountain Club area, this route quickly gets into the climbing, so be ready to work. There are no services between the Durango Mountain Resort area and Silverton, so pack plenty of water and snacks. Given the high altitude and potential for rapid weather changes, it's wise to check the forecast and start early, especially if you plan to extend your ride to include Molas Pass.

This route is part of the iconic Million Dollar Highway, known for its challenging climbs and breathtaking scenery. It offers a significant high-altitude cycling challenge, reaching elevations close to 11,000 feet. While the immediate summit of Coal Bank Pass can be tree-covered, the broader views as you continue along the route are truly expansive, showcasing the rugged beauty of the Colorado Rockies.

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10. Coal Bank Pass – Coal Bank Pass loop from Haviland Lake SWA

48.4km

02:35

930m

Hard road ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.

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Frequently Asked Questions

How many road cycling routes are available in San Juan National Forest?

San Juan National Forest offers a selection of 11 road cycling routes, catering to various skill levels from easy to difficult. These routes allow cyclists to explore the diverse landscapes of the region.

What kind of terrain and elevation can I expect on road cycling routes in San Juan National Forest?

The terrain in San Juan National Forest is highly varied, featuring remote, winding roads and challenging mountain passes with significant elevation gains, as well as easier, mostly paved sections. For instance, the Hermosa to Coal Bank Pass route involves a substantial elevation gain of over 4,700 feet, while routes like Falls Creek Road offer a more gentle experience through forested areas.

Are there any easy or family-friendly road cycling routes in the forest?

Yes, there are several easier options suitable for varying fitness levels, including family-friendly rides. Routes such as the Oxbow Park and Preserve – Animas River Trail loop from Trimble and the Fassbinder Bridge – Durango, Colorado loop from Trimble are mostly paved and offer a more relaxed cycling experience.

What are some scenic highlights or landmarks I can see along the road cycling routes?

Road cycling in San Juan National Forest offers breathtaking views. You can experience the dramatic mountains and alpine vistas, especially along the San Juan Skyway, which includes the renowned Million Dollar Highway. Specific highlights include mountain passes like Red Mountain Pass and viewpoints such as View on Grenadier Range. You might also encounter picturesque lakes like Ice Lake.

Are there any circular or loop road cycling routes available?

Yes, the region features several excellent loop routes. A popular moderate option is the Lemon Reservoir – Animas River Trail loop from Hermosa Creek, which combines paved sections with some elevation. For easier rides, consider the Oxbow Park and Preserve – Animas River Trail loop from Trimble.

What is the best time of year for road cycling in San Juan National Forest?

The best time for road cycling in San Juan National Forest is generally during the warmer months, from late spring through early fall, when mountain passes are clear of snow and weather conditions are more stable. Always plan for elevation changes and potential weather shifts, as conditions can vary rapidly in mountainous terrain.

What do other road cyclists enjoy most about the routes in San Juan National Forest?

The road cycling routes in San Juan National Forest are highly rated by the komoot community, with an average score of 5.0 stars from over 28 reviews. Cyclists frequently praise the dramatic mountains, lush forests, and picturesque rivers that define the region, offering a wide range of experiences from challenging climbs to accessible paved sections.

Are there any specific safety considerations for road cycling in this area?

Given the varied terrain and elevation, it's important to plan for significant climbs and descents. Always wear a helmet, carry sufficient water and repair tools, and inform someone of your route. Be mindful of changing weather conditions, especially at higher elevations.

Can I access road cycling routes using public transport in the San Juan National Forest area?

While specific public transport options directly to all trailheads within the vast San Juan National Forest may be limited, the nearby city of Durango offers public transportation services. Cyclists should check local transit schedules for routes that may accommodate bikes or provide access to general areas near cycling routes.

Are there any dog-friendly road cycling routes or regulations to be aware of?

While many areas within San Juan National Forest are dog-friendly for general outdoor activities, specific regulations for dogs on road cycling routes can vary. It's always best to keep dogs on a leash and ensure they are well-behaved around other cyclists and wildlife. Check local signage or forest service guidelines for any specific restrictions on paved roads or trails.

What are the most challenging road cycling routes in San Juan National Forest?

For experienced cyclists seeking a challenge, routes like Hermosa to Coal Bank Pass are ideal. This route is classified as difficult, featuring significant elevation gain and alpine views, providing an exhilarating experience for those looking to test their endurance.

The best road cycling routes in San Juan National Forest

If you only do 3 of these routes

Compare these routes at a glance

1.

Hermosa to Coal Bank Pass

2.

Falls Creek Road

3.

Oxbow Park and Preserve – Animas River and Rotary Park loop from Trimble

4.

Animas River Trail – Lemon Reservoir loop from Hermosa Creek

5.

Purgatory Trailhead loop from Trimble

6.

Animas River Trail – Oxbow Park and Preserve loop from Trimble

7.

Coal Bank Pass – Molas Pass loop from Peregrine Parking

8.

Coal Bank Pass – Silverton loop from Elbert Creek Trail Parking

9.

Coal Bank Pass loop from Durango Mountain Club

10.

Coal Bank Pass – Coal Bank Pass loop from Haviland Lake SWA

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Animas River Trail – Oxbow Park and Preserve loop from Trimble	81.1 km	930 m	Hard
Coal Bank Pass – Molas Pass loop from Peregrine Parking	47.8 km	1,310 m	Hard
Coal Bank Pass – Silverton loop from Elbert Creek Trail Parking	78.7 km	1,860 m	Hard
Coal Bank Pass loop from Durango Mountain Club	24.7 km	670 m	Moderate
Coal Bank Pass – Coal Bank Pass loop from Haviland Lake SWA	48.4 km	930 m	Hard