The Continental Divide Trail is 3,100 miles [4,989 km] on the congressionally designated corridor from Mexico to Canada. Your actual walking distance can change because the CDT has alternates, reroutes, road walks, snow detours, fire closures, and route choices through five Rocky Mountain states.
How long is the Continental Divide Trail?
The Continental Divide Trail is 3,100 miles [4,989 km] long.
That is the standard figure used by the Continental Divide Trail Coalition and federal land-management references for the Continental Divide National Scenic Trail. The CDT runs between the Mexican border in New Mexico and the Canadian border in Montana, tracking the high spine of the Rockies through New Mexico, Colorado, Wyoming, Idaho, and Montana.
Here’s the catch: 3,100 miles is the corridor number, not a guaranteed step count. If you thru-hike the CDT, you may walk more or less than that depending on which alternates you take, which terminus you use in Glacier, which snow routes are safe, and which closures are active that season.
The CDT is not a single, unchanging sidewalk across the West. It is a living trail across national forests, national parks, BLM land, wilderness areas, state lands, road segments, and high alpine country. Some years, a fire closure sends hikers onto a reroute. Some years, deep snow in Colorado changes early-season plans. Some hikers choose official alternates to hit towns, avoid dangerous conditions, or take a more scenic line.
Where does the Continental Divide Trail start and end?
The CDT runs from the Mexico border in New Mexico to the Canada border in Montana.
The southern end is in the New Mexico bootheel near the Crazy Cook area. The northern end is in Glacier National Park, where hikers commonly finish at or near the Canadian border. The classic mental picture is simple: desert borderlands to glacier-carved mountains. The walking reality is messier, wilder, and much better.
Southbound hikers usually start in Montana and walk toward New Mexico. Northbound hikers usually start in New Mexico and walk toward Montana. Flip-floppers split the trail into pieces to work around snow, wildfire, jobs, family, or plain old common sense.
The CDT follows the Continental Divide of the Americas, the watershed line that separates rivers draining toward the Pacific from those draining toward the Atlantic, Gulf of Mexico, or Arctic systems. You won’t walk exactly on the Divide every minute. The route drops into towns, swings around private land, crosses basins, and takes practical lines through rough country.
How many miles is the CDT in each state?
The CDT mileage by state adds up to 3,100 miles [4,989 km], with the longest stretches in New Mexico and the combined Idaho/Montana section.
State mileage can shift as trail sections are relocated, improved, or rerouted. The figures below are planning numbers, not a promise that your GPS track will match them to the mile.
| State | Planning mileage | What the miles feel like |
|---|---|---|
| New Mexico | 820 miles [1,320 km] | Desert, mesas, long water carries, big sky, and exposed road walks |
| Colorado | 750 miles [1,207 km] | High alpine travel, passes, snow risk, storms, and huge elevation |
| Wyoming | 510 miles [821 km] | Great Divide Basin, Wind River Range, Yellowstone country |
| Idaho and Montana | 1,020 miles [1,642 km] | Border walking, forests, remote ranges, grizzly country, Glacier finish |
These state chunks help you think in sections. New Mexico is not just “the warm-up.” Colorado is not just “the pretty part.” Wyoming is not empty. Montana is not a victory lap. Every state can humble you in its own special way.
Why do hikers give different CDT mileage numbers?
Hikers give different CDT mileage numbers because the CDT has multiple accepted route choices.
You may see 3,000 miles, 3,028 miles, 3,050 miles, or 3,100 miles in trip reports and planning notes. Those numbers are not always mistakes. They usually reflect different map data, alternates, older alignments, or personal GPS tracks.
The CDT is famous for options. Some alternates are official. Some are common thru-hiker choices. Some are temporary reroutes around snow, wildfire, construction, flooding, or land-management restrictions. Two hikers can both complete a border-to-border CDT journey and still walk different total distances.
Common reasons your CDT mileage changes include:
- Official alternates: Different mapped lines can change your total mileage.
- Fire closures: Wildfire can force long detours on roads or nearby trails.
- Snow detours: Early-season high routes may be unsafe without the right conditions and skills.
- Town access: Walking into and out of resupply towns adds real miles.
- Terminus choice: Northern Montana options can change the final distance.
- Road walks and relocations: The official tread continues to evolve as trail managers improve the corridor.
How long does it take to hike the Continental Divide Trail?
Most thru-hikers should plan on 4 to 6 months for a CDT thru-hike.
That range gives you room for snow delays, injury prevention, resupply chores, permits, storms, rest days, and the mental grind of linking 3,100 miles [4,989 km] on foot. Fast hikers can finish quicker. Section hikers can take years. Both count if the journey is honest and complete by the hiker’s own goal.
Your daily mileage will not stay steady. New Mexico can move quickly when water and heat cooperate. Colorado can slow you with elevation, snowfields, lightning, and steep climbs. Wyoming can be fast in the basin and slow in the Winds. Montana and Idaho can throw mud, blowdowns, storms, and big gaps between services.
A simple pace framework looks like this:
| Average pace | Trail days for 3,100 miles | Best fit |
|---|---|---|
| 15 miles/day [24 km/day] | 207 hiking days | Conservative pace with frequent rest or shorter days |
| 20 miles/day [32 km/day] | 155 hiking days | Common thru-hiker planning pace |
| 25 miles/day [40 km/day] | 124 hiking days | Experienced, efficient hikers with strong recovery |
| 30 miles/day [48 km/day] | 104 hiking days | Very fast hikers with dialed systems and long daylight pushes |
Those numbers do not include zeros unless your “average pace” includes every day from start to finish. That matters. A hiker who walks 22 miles [35 km] on hiking days but takes regular town days will finish later than the math first suggests.
Is the Continental Divide Trail longer than the Appalachian Trail and Pacific Crest Trail?
Yes, the CDT is longer than both the Appalachian Trail and the Pacific Crest Trail.
The Appalachian Trail is commonly listed at a little under 2,200 miles [3,541 km]. The Pacific Crest Trail is commonly listed at 2,650 miles [4,265 km]. The CDT’s 3,100 miles [4,989 km] makes it the longest of the three Triple Crown trails.
Length is only part of the story. The CDT also feels less uniform. It has more route choice, more remote stretches, more high-elevation exposure, and a stronger need for judgment. On the AT, white blazes keep you on a tight corridor. On the PCT, the tread is often more continuous and graded. On the CDT, you may be reading the sky, checking water, making a call at a junction, and watching a wall of weather build over the next pass.
How hard is the CDT compared with its mileage?
The CDT is harder than its mileage because the terrain, altitude, weather, and route-finding stack up fast.
A 3,100-mile trail is already a monster. Add the Rockies, desert heat, snow travel, long water gaps, afternoon lightning, grizzly habitat, and thin air, and the number on paper starts to feel polite.
Difficulty changes by section:
- New Mexico: Heat, exposure, scarce water, road walking, and long dry stretches.
- Colorado: Sustained altitude, snow, lightning, steep climbs, and cold nights.
- Wyoming: Basin heat and wind, then rugged mountain travel in the Winds and Yellowstone region.
- Idaho/Montana: Remote ridges, grizzly country, storms, blowdowns, and logistics that can bite late in a thru-hike.
Do not judge the CDT by mileage alone. A 20-mile [32 km] day on smooth trail near town is not the same as a 20-mile day above treeline with hail, wet socks, fading light, and your next water still two ridges away.
How should you plan your CDT mileage?
Plan your CDT mileage in sections, then adjust for real conditions.
The best CDT plan is sturdy but not rigid. If you build a schedule that only works in perfect weather, it will break. If you build one with buffers, alternates, and honest resupply spacing, you’ll have room to make better decisions.
- Pick your direction. Choose northbound, southbound, or flip-flop based on snow, season, and your available start date.
- Break the trail into states. Use New Mexico, Colorado, Wyoming, and Idaho/Montana as your first planning blocks.
- Estimate your hiking-day pace. Use a conservative daily average for the first month, then increase only if your body handles it.
- Add town time. Resupply, laundry, charging, eating, repairs, and sleep all take time.
- Check current maps. The CDTC maps and data page provides current map resources and official route data.
- Check closures before each section. Fire, flood, wildlife, and construction updates can change your next week of walking.
- Carry backup navigation. A phone app is useful. A battery plan, downloaded maps, and the skill to read them are better.
Do you need permits to hike the whole CDT?
You do not need one single permit for the entire CDT, but some CDT sections require permits for overnight camping.
As of November 2026, Glacier National Park requires a wilderness use permit for overnight backcountry camping. As of November 2026, Yellowstone National Park requires a backcountry permit for all overnight stays in the backcountry. As of November 2026, Rocky Mountain National Park requires a wilderness permit for overnight wilderness backpacking.
That does not mean every CDT hiker camps inside each national park. Some route choices and itineraries can pass through or near regulated areas differently. Still, you should treat permits as part of CDT planning, not as a last-minute errand. National park campsites can be limited, and your preferred dates may not line up with your actual pace.
For land outside national parks, rules vary by agency, forest, wilderness area, state land, and local order. Before you enter a new management area, check the current land manager page and the CDTC Closures & Alerts resources.
What is the best direction to hike the CDT?
The best direction depends on your start date, snow year, and schedule.
Northbound is popular because it starts in New Mexico in spring and aims to reach Montana before deep fall weather. Southbound usually starts after high-country snow in Glacier has eased, then races the calendar toward Colorado and New Mexico. Flip-flopping can be the smartest choice when snowpack, wildfire, or your life schedule refuses to behave.
Northbound has a clear appeal: build trail legs in New Mexico, hit Colorado when the snow is safer, and finish in Glacier with a big emotional punch. But a high snow year can make Colorado complicated. A late start can make Montana risky. A dry year can make New Mexico water planning sharper.
Southbound starts with a bang in the northern Rockies. That is beautiful, and it is not gentle. You may hit remote terrain and grizzly country before your body has fully adapted to long-distance rhythm.
What should you carry for a 3,100-mile trail?
Carry gear that handles desert heat, alpine cold, long food carries, and sudden weather.
The CDT punishes gear chosen for only one climate. You need a flexible system, not a fantasy spreadsheet built for perfect July afternoons. Your kit should change by section, but your baseline should be reliable from border to border.
- Current maps, downloaded offline, plus backup power
- Shelter that handles wind, rain, and cold nights
- Sleep system appropriate for shoulder-season mountain conditions
- Water capacity for dry New Mexico and basin stretches
- Water treatment method you will actually use
- Sun protection: hat, sunglasses, sunscreen, and long sleeves
- Rain gear and warm layers for high-elevation storms
- Food storage system required for the area you are entering
- Repair kit for shoes, shelter, pad, and electronics
- Headlamp, first-aid basics, and emergency communication plan
Grizzly habitat adds another layer in Wyoming, Idaho, and Montana. Learn food-storage rules before you arrive, not at the trailhead sign while mosquitoes chew your ankles.
Can you section hike the Continental Divide Trail?
Yes, you can section hike the CDT in pieces instead of doing one continuous thru-hike.
Section hiking may be the cleanest way to experience the CDT if you have limited vacation time or want to avoid the pressure of a single long push. You can hike one state, one national forest, one gateway community stretch, or one high-value scenic segment.
Good section-hike planning starts with transportation. Some trail towns have easier access than others. Some trailheads sit far from commercial shuttles or public transit. In remote areas, a 70-mile [113 km] section can require more planning than a 200-mile [322 km] stretch near a well-used corridor.
If you section hike, keep records. Write down dates, start points, end points, alternates, and skipped miles. Future-you will thank you when the CDT becomes a multi-year project and every state line starts to blur.
Related reading
- How Long Is the Appalachian Trail? Miles, States and Time
- Where Does the Appalachian Trail Start and End?
- How Long Does It Take to Hike the Appalachian Trail?
- How Long Is the Pacific Crest Trail and How Long Does It Take?
FAQ
How long is the Continental Divide Trail in miles?
The Continental Divide Trail is 3,100 miles [4,989 km] long. Your actual walking distance can differ because of alternates, closures, detours, town walks, and terminus choices.
How long does it take to complete the CDT?
Most thru-hikers should plan on 4 to 6 months. A faster hike requires high daily mileage, few rest days, efficient resupply, and favorable conditions.
What states does the Continental Divide Trail go through?
The CDT goes through New Mexico, Colorado, Wyoming, Idaho, and Montana. It follows the Rocky Mountain spine between Mexico and Canada.
Is the CDT fully finished?
The CDT is a designated national scenic trail, but the route continues to evolve through relocations, improvements, and management changes. Some segments still use roads or practical connectors where permanent trail tread is limited.
Is the CDT harder than the Pacific Crest Trail?
For many hikers, yes, the CDT is harder than the PCT. The CDT has more route choice, more remote terrain, rougher logistics, and more frequent decision-making in snow, storms, water-scarce areas, and high mountains.
Can beginners hike the Continental Divide Trail?
A beginner can section hike parts of the CDT, but a full thru-hike is a major undertaking. Build experience first with shorter backpacking trips, mountain navigation, weather judgment, resupply planning, and back-to-back long hiking days.