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COTREX is a project by the Colorado DNR and Colorado Parks and Wildlife.
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Colorado Trail Explorer
Any Activity
Hiking
Biking
Horseback Riding
Motorcycle Riding
ATV Riding
OHV Riding (>50”)
Nordic Skiing
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RMNP North to South
Route by
harlangrossman3
Last Updated
Jan 14, 2026
Total Length
52.8mi
Ascent
15,832ft
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Elevation Profile
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Timeline
Start
Hiking
For 34.2mi
American Lakes Trail
,
American Lakes Snowmobile Trail
,
Thunder Pass Trail
,
Lulu City Network Trail
,
Colorado River Trail
,
Timber Lake Trail
,
Tonahutu Creek-Flattop Junction Trail
,
North Inlet-Flattop Junction Trail
,
Nanita/Nakoni Trail
1
Slope
Slope
Continue
Hiking
For 6.2mi
East Inlet to Fourth Lake Trail
2
Pass
Mountain Pass
Continue
Hiking
For 12.4mi
St. Vrain Glacier Trail
,
Buchanan Pass Trail
,
Mid St. Vrain Road
Weather
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