Montana trails · cdt
cdt
A 22.4-mile point-to-point in Montana, with 2,141 ft of climbing. Reaches Rock Spring and other lake/pass/spring/summit destinations.
Elevation profile
The climbing is spread fairly evenly along the route. It gives back about 3,989 ft along the way, so it rolls rather than climbing steadily.
3-D terrain
USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Reaches
- Rock Spring (spring)
- Pete Creek Divide (pass)
- Aldous Lake (lake)
- Little Table Mountain (summit)
Getting there
ALDOUS LAKE TRAILHEAD — parking nearby, restroom, water. 44.50939, -111.84379 · directions
Daylight at the trailhead
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 6:18 a.m., the sun rises at 6:48 a.m. and sets at 8:05 p.m., and the last usable light fades about 8:36 p.m. (MDT) — 13 h 17 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 22.4-mile route takes roughly 9 h 23 min, so leaving the trailhead at sunrise puts you back around 4:11 p.m. — 3 h 54 min before sunset.
Loop options
- cdt + Continental Divide National Scenic Trail — 9.1 mi loop, 2,395 ft gain
- cdt + Continental Divide National Scenic Trail — 1.7 mi loop, 264 ft gain
- cdt + Continental Divide National Scenic Trail — 7.2 mi loop, 1,335 ft gain
Across the border
- Continues into ID as Continental Divide Trail — view on the map
- Continues into ID as Aldous Lake Trailhead — view on the map
- Continues into ID as Continental Divide National Scenic Trail — view on the map