Continental Divide National Scenic Trail

Overview

The Continental Divide Trail (CDT) stretches 3,028 miles from the U.S.-Mexico border in New Mexico to the Canadian border in Montana, following the spine of the Rocky Mountains through New Mexico, Colorado, Wyoming, Idaho, and Montana. Known by its unofficial motto "Embrace the Brutality," the CDT is considered the most challenging of the Triple Crown trails, demanding advanced navigation skills, wilderness self-sufficiency, and mental fortitude. Unlike the well-marked Pacific Crest Trail or Appalachian Trail, the CDT requires constant route-finding—hikers often check maps every fifteen minutes. The trail offers tremendous route variation with numerous high and low alternates that can change your total mileage by up to 1,000 miles.

With over 460,000 feet of cumulative elevation gain (equivalent to climbing Everest from sea level more than 15 times), the CDT traverses some of North America's wildest terrain. You'll walk through grizzly country, cross high alpine passes above 14,000 feet, navigate desert stretches with 40-mile waterless sections, and ford rivers that can sweep you off your feet. This trail is best suited for experienced backpackers comfortable with off-trail navigation, managing objective hazards, and handling long resupply stretches. Colorado was voted the most difficult state by 81% of thru-hikers, though each state presents unique challenges—from New Mexico's scorching heat and scarce water to Montana's grizzly encounters and Wyoming's Great Divide Basin.

Permits & Regulations

The CDT has no single comprehensive permit, but thru-hikers must obtain multiple permits across the five states:

Required Permits: - New Mexico State Trust Lands Recreational Access Permit ($35/person): Covers approximately 70 miles between Crazy Cook Monument and Cumbres Pass. Available through the Continental Divide Trail Coalition (CDTC). - Southern Terminus Access Permit: NEW as of recent years—only U.S. citizens can access the final 1.1 miles to the southern terminus due to the National Defense Area designation. Application takes 2-21 days; apply well in advance. - Yellowstone National Park Backcountry Permit ($3/person/night): Must be obtained in person no more than 48 hours before your trip starts. First-come, first-served. - Glacier National Park Backcountry Permit ($10 permit fee + $7/person/night): Advance reservations open in spring; designated campsites required. Competition is fierce—have backup itineraries ready. - Rocky Mountain National Park Overnight Permit: Hard-sided bear canister required for all wilderness camping. - Blackfeet Nation Fish & Wildlife Recreation Permit: Required to cross the Blackfeet Reservation at Glacier's southern boundary. - Indian Peaks Wilderness Overnight Permit ($5/group, June 1-Sept 15): Covers a Colorado section with specific campfire prohibitions east of the divide.

Bear Canister Requirements: Mandatory in Rocky Mountain National Park, Glacier National Park, San Juan National Forest, and portions of Bridger-Teton National Forest. Recommended throughout grizzly country (Lander, Wyoming through Montana/Canada).

Fire Restrictions: Campfires prohibited year-round in Indian Peaks Wilderness east of the Continental Divide and in specific high-alpine zones near Crater Lake, Caribou Lake, Columbine Lake, and others. Absolutely no fires on New Mexico State Trust Lands. Seasonal fire bans common in summer.

Camping Regulations: Camp at least 100 feet from water and trails. Group size limited to 12 people and livestock combined. Outside national parks, dispersed camping is generally allowed, though some wilderness zones require designated sites only.

For detailed permit information, visit the U.S. Forest Service CDT page and Continental Divide Trail Coalition.

Best Season

Northbound (NOBO): Mid-April to mid-May starts are optimal. This timing lets you push through southern New Mexico's desert before brutal summer heat arrives, then hit Colorado's high country as snowpack becomes manageable in late June/early July. NOBOs aim to exit Glacier before September snowfall.

Southbound (SOBO): Mid-June to early July starts work best, waiting for Glacier's high passes and Montana snowpack to clear. SOBOs race to finish New Mexico before winter storms arrive in late October/November.

State-by-State Timing: - New Mexico: Best from late April to early June. After June, expect extreme heat (100°F+) and monsoon thunderstorms (July-early September) with violent afternoon lightning. - Colorado: Snow typically clears from high passes by late June to mid-July. Monsoon season peaks July-August with near-daily afternoon thunderstorms at 1-3 PM. Avoid being above treeline (11,000-12,000 feet) during storm windows. Fall colors peak in late September, but snow can return by early October. - Wyoming: High-alpine areas like the Wind River Range clear by July. The Great Divide Basin is accessible earlier but offers brutal sun exposure. - Montana: Snowmelt typically occurs by late June/July. Grizzly activity peaks in late summer/fall as bears fatten up for hibernation.

Wildflower peak: Late June through July in Colorado's high country. Mosquitoes are worst immediately after snowmelt (late June-early July).

Water & Resupply

Water management on the CDT is often overstated but requires careful planning. The biggest challenges are in New Mexico and Wyoming's Great Divide Basin, where 20-40 mile dry stretches occur.

Seasonal Water Reliability: - New Mexico: Most unreliable water of the entire trail. The southernmost 100 miles (Lordsburg to Mexico border) is extremely challenging. Expect cattle troughs, windmills, and intermittent streams. Springs dry up by June. The CDTC offers water caching service ($25, or included with their southern terminus shuttle). - Colorado: Generally reliable with snowmelt-fed streams through July. Late-season (September+) sources can diminish. High-alpine areas have abundant water when snow is melting. - Wyoming: Great Divide Basin has notorious dry stretches. Wind River Range offers reliable water from snowmelt streams. - Montana: Most reliable water of the trail, though some sources diminish by late August.

Use crowd-sourced water reports (available through CDTC and navigation apps) to get real-time updates from hikers ahead of you. Always carry 4-6 liter capacity for desert sections.

Resupply Strategy:

Most hikers aim for 4-5 day intervals between towns. Colorado offers the easiest resupply with grocery stores in nearly every trail town—you can skip mail drops entirely. New Mexico, Wyoming, and Montana require more planning, with hikers typically sending 6-10 mail drops to strategic locations.

Popular Resupply Towns: - New Mexico: Lordsburg, Silver City, Pie Town, Grants, Cuba, Ghost Ranch, Chama - Colorado: Pagosa Springs, Creede, Lake City, Leadville, Breckenridge, Silverthorne, Winter Park, Grand Lake, Steamboat Springs - Wyoming: Encampment, Rawlins, Lander, Dubois, Pinedale - Montana: Lima, Butte, Lincoln, East Glacier, Polebridge

Mail drops can be sent to post offices (closed Sundays—plan accordingly), gas stations, or outdoor shops. Some remote locations like Doc Campbell's, Pie Town, and Benchmark serve as crucial resupply points despite tiny populations.

Resupply Distances: Colorado sections average 60-90 miles between towns. New Mexico and Wyoming can stretch 100-120+ miles. Montana sections vary from 50-100 miles.

Hazards & Challenges

Lightning: The CDT's greatest objective danger. Colorado's high-altitude traverses keep you above treeline (11,000-14,000+ feet) during peak monsoon season (July-August). Afternoon thunderstorms strike with terrifying regularity from 1-3 PM. Hikers report lightning strikes within 50-300 feet, running down exposed ridges in hail and sleet. Strategy: Start alpine climbs at dawn, summit by noon, descend to treeline before afternoon storms build. If caught above treeline, avoid peaks, ridgelines, isolated trees, and metal objects. Crouch low if lightning is imminent.

Grizzly Bears: Grizzlies inhabit the CDT from Lander, Wyoming through Montana and into Canada. Yellowstone, the Wind River Range, the Bob Marshall Wilderness, and Glacier are prime grizzly habitat. Multiple hikers report bluff charges within 50 feet. One trail runner and one forest worker were killed near the CDT in recent years. Proper food storage is critical—bear canisters are required in most of this range. Make noise on blind corners, especially near streams. Never run from a bear. Carry bear spray and know how to use it.

River/Creek Crossings: High-water season (May-July) makes river crossings extremely dangerous. Texas Creek, Sun River, and numerous unnamed fords have swept hikers downstream. Scout crossings, unbuckle pack straps, use trekking poles for stability, and cross at the widest/shallowest point. Early morning crossings are safest when overnight freeze reduces flow. If water is above your knees or moving swiftly, wait or find an alternate route. Some hikers carry lightweight camp shoes for fording.

Navigation Challenges: The CDT requires constant navigation. In New Mexico, hikers report entire days following GPS with no discernible trail. Barbed wire fences frequently block the route. Whiteouts in Colorado can obliterate trails above treeline. Montana's Bob Marshall Wilderness has numerous unmarked junctions. Carry detailed maps, GPS device or phone app, compass, and know how to use them. Most thru-hikers download offline maps and use navigation apps with crowd-sourced waypoints.

Altitude: Passes regularly exceed 12,000-13,000 feet in Colorado, with Gray's Peak reaching 14,270 feet. Altitude sickness is common. Acclimatize gradually, stay hydrated, and descend if symptoms worsen (headache, nausea, confusion).

Exposure/Weather: Hypothermia risk is real, even in summer. Colorado's high traverses offer no shelter from wind, rain, and hail. Early-season snow (June) and late-season storms (September) can dump feet of snow overnight. Carry insulated layers and rain gear year-round.

Wildfires: Increasingly common, especially in Montana and Colorado. Check current closures and have bailout plans. Smoke can reduce visibility and air quality for weeks.

Getting There

Southern Terminus (Crazy Cook Monument, NM): - Nearest Town: Lordsburg, NM (3 hours by vehicle from terminus) - Airports: El Paso, TX (2.5 hours to Lordsburg); Tucson, AZ (3 hours); Albuquerque, NM (4 hours) - Shuttle Service: Continental Divide Trail Coalition operates shuttles during peak season (late March-mid May) for $175 including water caching and CDTC membership. Service runs from Lordsburg to the trailhead. Book months in advance. - Road Conditions: High-clearance 4WD required. The final approach crosses remote desert roads often impassable after rain. Due to National Defense Area restrictions, only U.S. citizens with pre-approved permits can access the final 1.1 miles.

Northern Terminus (Waterton, Canada via Glacier NP): - Nearest Town: East Glacier, MT; also Whitefish, MT - Airports: Glacier Park International Airport (Kalispell, MT); Spokane, WA (4 hours) - Shuttle Services: Multiple operators run shuttles from Kalispell, Whitefish, and East Glacier to trailheads. Book in advance during summer. - Border Crossing: The official northern terminus is at the U.S.-Canada border in Glacier National Park. A 4-mile walk leads to Waterton, Alberta, Canada. Ensure you have proper documentation for border crossing.

Trailhead Access Notes: Many trailheads require high-clearance vehicles; some need 4WD. Parking is limited at popular access points like Wolf Creek Pass (CO) and Monarch Pass (CO). Overnight parking is prohibited at some trailheads—check regulations. Many Colorado and New Mexico trailheads are accessible by 2WD, but Wyoming and Montana backcountry roads often require higher clearance.

Regional Shuttle Services: Contact CDTC for current shuttle operator lists. Shuttle Taos operates in New Mexico for section hikers. Colorado Trail shuttlers also service CDT sections. Costs range from $50-200+ depending on distance.

Tips

Start Early for Lightning: In Colorado, adopt an "alpine start" mentality. Begin hiking at first light (5-6 AM) to summit high passes by 11 AM-noon, then descend to treeline before 1 PM thunderstorms. Sleeping near treeline lets you descend quickly if needed.

Satellite Maps for Camp Selection: Unlike the PCT or AT, the CDT has few established campsites. Download Google Earth satellite imagery offline to scout potential camps, especially above treeline. Look for flat benches, tree clusters for wind protection, and proximity to water. In exposed terrain, even a small rock outcrop can provide critical wind shelter.

Flexibility is Survival: The CDT demands adaptability. Weather, wildfires, snow conditions, and route closures require constant re-planning. Hikers often choose their daily route each morning based on water reports and weather forecasts. Don't rigidly commit to schedules—"embrace the brutality" means accepting what the trail gives you.

Water Caching: In New Mexico, volunteer water caches at road crossings can be lifesavers, but never rely on them. Carry full capacity between reliable sources. Cache water for yourself if you're section hiking with vehicle support.

National Park Permit Strategy: Yellowstone and Glacier permits are competitive. For Yellowstone, show up at ranger stations 48 hours early with multiple backup itineraries. For Glacier, be online the moment reservations open and have 3-4 alternate routes ready. Some hikers skip Glacier's official CDT route to avoid permit hassles, using the nearby Highline Trail instead.

Alternate Routes: The CDT has dozens of official alternates. Notable ones include the Gila River High Route (NM), Creede Cutoff (CO), Cirque of the Towers (WY), and the Anaconda Route (MT). Research alternates in advance—some are more scenic, others avoid hazards, and many add or subtract significant mileage/elevation.

Navigation Apps: Most thru-hikers use digital navigation with offline maps and crowd-sourced waypoints. Water reports update in real-time from hikers ahead. Download maps for entire states before entering service-free zones.

Money Management: Budget 25% more than expected. Flipping sections (skipping ahead due to weather/fire, then returning) is common and expensive. Lodging, shuttles, and resupply costs have increased significantly.

Respect Closures: Don't trespass on State Trust Lands without permits or enter closed National Defense Areas without authorization. Respect private property and livestock operations—many ranchers tolerate hikers, but abuse of goodwill can result in permanent closures.

Wildlife Smarts: In grizzly country, cook and eat 100+ yards from where you sleep. Store food in bear canisters or hang properly. Make noise constantly—talk, sing, clap—especially near streams that mask sound. Don't hike at dawn/dusk when bears are most active. If you see fresh bear scat or claw marks, be extra vigilant.

Social Trail: The CDT has a smaller, more tight-knit community than the PCT or AT. You'll likely hike alone for days, then reunite with familiar faces in trail towns. The isolation is part of the experience—embrace solitude, but also cherish the camaraderie when it appears.

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