Great Parks South

From alpine tundra above 12,000 feet to the red-rock desert of the Four Corners, a high-country ride that rarely stays level for long.

Distance
695 miles
Surface
100% paved
3 weeks–2 months
Route Type
Point to Point

Ride the Great Parks South

Running entirely within Colorado, this route travels south from Steamboat Springs through Rocky Mountain National Park and the ski towns of Summit County before finishing in Durango.

What to Expect

This is a strenuous route that crosses 11mountain passes, six of them over the Continental Divide, with very little flat riding in between. The ski towns from Keystone to Breckenridge draw heavy tourist and recreational traffic in season, though good paved bike paths through Summit County help riders avoid the worst of it.

Trail Ridge Road in Rocky Mountain National Park is the headliner: the highest continuous paved road in the country, topping out above 12,000 feet with 11 miles above tree line. Farther south come the sheer walls of the Black Canyon of the Gunnison, sweeping views of the San Juan Mountains from the Dallas Divide, and historic Telluride. The ride ends in Durango, home to the Durango & Silverton Narrow Gauge Railroad, with an optional spur to the cliff dwellings of Mesa Verde National Park.

This route starts at about 6,700 feet in Steamboat Springs, tops out at 12,183 feet on Trail Ridge Road in Rocky Mountain National Park, and finishes at about 6,500 feet in Durango. In between, riders spend most of their time either climbing or descending, with only a few stretches of true river-valley riding for a break. Forested passes and high mountain parks give way south of Montrose to red-rock canyons and open mesa country. The full route includes detailed riding conditions and field notes for every climb and descent.

Small towns provide regular services throughout, and remoteness is less of a factor here than tourist volume, especially along the ski resort corridor. Cell coverage is generally good in towns but can drop out on high passes and in the Four Corners stretch, so download your Ride with GPS route for offline use.

Ride this route from early summer to early fall, roughly June through September. Trail Ridge Road typically opens in late May and closes by mid-October, depending on snow, so check its status before you set your dates. Snow is possible at any time in the higher elevations, even in the height of summer, and afternoon thunderstorms are common in July and August, so plan to be over high passes by midday.

Route Sections

Steamboat Springs, CO to Poncha Springs, CO, 386.8 miles

From Steamboat Springs, the route climbs over Rabbit Ears and Muddy Passes and crosses open grazing land to Rocky Mountain National Park, where it tops out on Trail Ridge Road. From Estes Park, it heads south into Summit County, then runs through the high-country ski towns of Keystone, Dillon, Frisco, and Breckenridge before crossing Hoosier Pass toward Poncha Springs. The full route includes turn-by-turn directions, service information, and field notes for the entire section.

Alternates:

  • Berthoud Pass Alternate, 47 miles. A shorter option that bypasses Rocky Mountain National Park entirely via U.S. 40.

Poncha Springs, CO to Durango, CO, 305.5 miles

This section continues through old mining country from Salida toward Montrose, crosses the Dallas Divide near Ridgway, passes historic Telluride, and finishes through the dry, open Four Corners region into Durango.

Alternates:

  • Mesa Verde Spur, 52.3 mi. An out-and-back to Mesa Verde National Park. Park roads have no shoulders and can be unfriendly to bikes in peak season, so many riders camp at Morefield Campground and take a bus tour to the major ruins instead.

Plan Your Ride

Given the sustained high-altitude riding and heavy tourist traffic through Colorado’s ski towns, this route rewards planning acclimation time and reservations.

Trip Planning & Logistics

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Steamboat Springs is served by Yampa Valley Regional Airport in nearby Hayden, and Durango by Durango–La Plata County Airport, so riders can fly in to one end and out of the other. Riders who leave a car at the start will need to arrange a one-way rental or shuttle back, since [public transit options between Durango and Steamboat Springs are limited]. Rocky Mountain National Park uses a timed-entry reservation system in peak season, so check whether it applies to cyclists during your dates. This route is available as a digital route through Adventure Cycling’s shop and includes routing, detailed service information, riding conditions, and field notes for trip planning.

This route runs on paved highways and park roads, so a standard touring bike suits it well. A water purifier is recommended given the amount of primitive camping involved. Pack cold-weather gear and rain protection regardless of season, since snow is possible at high elevations even in summer, and bring reflective or bright clothing for the sections with heavy RV and tourist traffic near Rocky Mountain National Park and the ski towns.

Reservations are recommended around Colorado’s ski towns in season, since recreational traffic and vacationers can fill up lodging and campgrounds quickly. Some campgrounds charge solo cyclists the same as a full tent or RV site, often $10 to $20 per night. Many private and Forest Service campgrounds close or lose water access after October 1, so call ahead if traveling late in the season.

Small towns along the route provide regular services, though high-altitude services, including campground water and grocery stores, can shut down early in the fall depending on weather. Check your digital route in Ride with GPS for service phone numbers, and call ahead for anything outside peak season.

Ride early in the day near Rocky Mountain National Park and the Summit County ski towns to avoid the heaviest RV and recreational traffic, and use bright clothing for visibility. Altitude sickness is a real consideration given this route’s sustained high elevations, so consider arriving a few days early to acclimate before starting. Lightning is a serious hazard above tree line, so start early, aim to be over high passes by midday, and descend quickly if a storm builds. Long, steep descents demand good brakes and full attention, especially on wet pavement. Black bears are common in Colorado’s mountains, so store food properly at camp.

Always check Adventure Cycling Route Updates and Corrections before you go.

Routes change. Bridges wash out, businesses close, and construction pops up overnight. We strive to keep routes updated as those things happen. When we learn about a change, we reroute around sections that have become dangerous, update service information as businesses open, close, or move, and reroute around temporary road and bridge closures or construction. Digital routes are updated as soon as we’ve reviewed a reported issue.

You’re often the first to spot these changes out on the road. Help us keep this route accurate for the next rider by reporting anything you notice with our Route Feedback Form.

This Route Is Part of Something Bigger

It’s one piece of the Adventure Cycling Route Network, began in 1976 and built on a simple mission: to empower people to travel by bike. Our team maps and maintains it; our members and donors make it possible.

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Frequently Asked Questions

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It’s our flagship, staff-built route network. The one that started it all 50 years ago with the TransAmerica Trail, the route that launched bicycle touring and bikepacking in America. Every route in it is designed and researched by our own team of cyclists and cartographers: months of research and on-the-ground testing go into each one, so what you get is more than a line on a map. Each Adventure Cycling route has detailed logistics, terrain and elevation info, points of interest, camping and lodging, safety alerts, and history, all in one place. It’s the most in-depth of our three networks, available as digital routes and most as paper maps too. It’s the route network we update most regularly as conditions change.

They’re related, but not the same thing. The Adventure Cycling Route Network is made up of routes we’ve researched, ridden, and mapped ourselves, chosen specifically for a great touring or bikepacking experience. The U.S. Bicycle Route System (USBRS) is a state-by-state national system that we serve as technical experts for, made official through each state’s department of transportation. The two overlap in a lot of places, but an ACRN route carries our own on-the-ground vetting; a USBRS route carries official state recognition.

It depends! If you want a route we’ve personally scouted end to end, with services, camping, and terrain notes built in, start with the Route Network. The ACA Route Network has routes of many different lengths and can be a much easier starting place for someone new to bicycle travel. If you’re an experienced cyclist piecing together an officially designated corridor, or riding somewhere the two systems converge, the interactive USBRS map is a good resource to use.

The Adventure Cycling Route Network is a premium network because of everything that goes into it. Unlike the U.S. Bicycle Route System (built by state DOTs) or Short Routes (submittedby cyclists in their own communities), every Adventure Cycling route is researched, ridden, and vetted end-to-end by our own team. Unlike other routes, Adventure Cycling routes come with extensive information on riding conditions, terrain notes, camping and lodging info, logistics, safety alerts, and points of interest. We also keep it current as roads and services change. The price supports that ongoing research and maintenance work, done by a nonprofit whose whole mission is making sure the route in your hands is one you can trust.

Turn-by-turn directions with a bike icon aren’t the same as a route built for specifically touring or bikepacking. Every mile in the Adventure Cycling Route Network has been researched and ridden by our staff and researchers, chosen to avoid dangerous traffic, and mapped with what a touring cyclist actually needs — food, water, camping, hotels, bike shops — spaced out along the way. The Adventure Cycling Route Network was built for cyclists by cyclists, is regularly updated, and comes with the resources and information needed to plan your ride.

No. The network includes routes for a wide range of experience and difficulty levels, from a first multi-day trip to a cross-country expedition. What every route has in common is that it was chosen with a touring cyclist’s needs in mind, whatever kind of trip you’re planning.

Not at all. Alongside iconic long-distance routes like the TransAmerica Trail, the network includes shorter regional routes, so it works for a weeklong vacation or a two-month journey.

For many years, we focused on paved routes, but today the network includes plenty of unpaved gravel riding for bikepacking. In fact, Adventure Cycling mapped the Great Divide Mountain Bike Route in 1998, arguably the most impactful bikepacking route in the world. The Adventure Cycling Route Network also includes the Golden Gravel Trail, Idaho Hot Springs Mountain Bike Route, Arkansas High Country Route, and more. Some routes are a 50/50 mix of pavement and gravel. Some routes follow paved and unpaved bike paths and rail trails. The Adventure Cycling Route Network has terrain for every cyclist.

We revisit our printed maps every three to five years, and push corrections to our digital route data as we learn about changes on the ground. If you have an Adventure Cycling Route in Ride with GPS that we’ve updated, you’ll get a notification when you open the route to update to the newest version of the route. Updating will ensure you have the latest data, information, and points of interest vital to being on route. For cyclists who have Adventure Cycling paper maps, we keep a list of route- and section-specific updates current on our Map Updates and Corrections page.

Change comes from two directions: our own staff research and reports from the cyclists actually out there riding them. If a bridge washes out, a shoulder disappears, a campground closes for repairs, or a town loses its only grocery store, that’s the kind of thing that triggers an update. You can help us keep our routes accurate; fill out our Route Feedback Form.

Most of our Adventure Cycling Routes come as waterproof print maps and digital Ride with GPS navigational data. Our print maps are the #1 longstanding popular resource for traveling cyclists. They are waterproof, highly detailed and always work. For long trips, many cyclists use a combination of print maps and digital routes.

If you’re already comfortable and familiar with a GPS navigational aid such as Ride with GPS or a Garmin, our digital data packages are an excellent choice. We do not recommend GPX data for beginners since there are a few extra steps to installing and troubleshooting.

Once you purchase a digital route, you’ll get an email with a link to unlock it in the free Ride with GPS app — no separate subscription required for basic navigation. From there you get turn-by-turn voice directions, curated points of interest like campgrounds and bike shops, and field notes on the history, geography, and climate along your route, all available 100% offline. If you’drather use a dedicated GPS device, you can export the route as a GPX file to load onto a Garmin, Wahoo, or similar device.

To export GPX files of your Adventure Cycling digital route, use your laptop or desktop to open the email you received after purchasing your digital route. Click on the link that allows you to access your Digital Route. Finally, click on EXPORT ALL at the bottom of the screen. This is the only way to export files that include the route line, points of interest, and services. Files will be exported as one ZIP file.

Adventure Cycling uses abbreviations across its paper and digital routes to indicate particular services, land or road types, route names, direction of travel, and route type. Please see our key to abbreviations.

If you have questions on how to purchase a digital route or about the route content, please contact Adventure Cycling: cartography@adventurecycling.org or 406-721-1776.

If you have questions on how to use your Digital Route in Ride with GPS, please check the Ride with GPS support page or email them at info@ridewithgps.com.

If you’re new to Ride with GPS, please check out the following resources:

Our print map panels aren’t always oriented northwards for space and layout reasons. Refer to the north arrows to help orient yourself if you’re not sure.

No. The Routes and Mapping Department does not do custom routes for individuals. Check out the routes we’ve already mapped, and use the interactive map to piece our route networks together, forming a route that gets you from a point A to point B of your choice.

It started with a single route. In 1976, we mapped the TransAmerica Trail, and more than 4,000 cyclists crossed the country together for Bikecentennial — the nation’s bicentennial cycling celebration our founders organized. That one route became the seed of a network we’ve spent the decades since expanding. Today it’s more than 58,000 miles of mapped routes across the U.S. and Canada, from classic epics like the TransAmerica Trail, Great Divide Mountain Bike Route, and Pacific Coast, to shorter regional routes.