Chasm Lake Trail
Trail features
Hover or long-press a feature to see its basis. Effort is computed from length and climb and is not an official difficulty.
Plan your visit
Access details come from OpenStreetMap tags and can be missing or out of date. Fees, permits and seasonal closures are not included here yet.
Parking, fees and permits
We don't have verified parking, fee or permit details for this trail, so they are unknown here. These rules change and are set by the land manager. Check the official pages:
- Rocky Mountain National Park official page ↗ · Rocky Mountain National Park on Arête
- Rocky Mountain Wilderness official page ↗ · Rocky Mountain Wilderness on Arête
Details
| Length | 0.84 micomputed |
|---|---|
| Route type | Unknownunknown |
| Surface | Groundfrom source |
| Difficulty | Mountain hiking (OSM sac_scale)from source |
| Elevation gain | 354 ftcomputed |
| Elevation loss | 68 ftcomputed |
| Highest point | 11,818 ftcomputed |
| Lowest point | 11,529 ftcomputed |
| Estimated duration | about 25 min one way (estimate, Naismith's rule)computed |
| Official verification | Not verified by an official sourceunknown |
Elevation
Length is measured from the route geometry in the source data, so it can differ from signed or official distances.
Nearby trails
- Longs Peak Trail (The Boulderfield)0.42 mi · 1.2 mi away
- Longs Peak Trail (The Ledges)0.31 mi · 1.5 mi away
Weather at the trailhead
Today: sunrise 7:14 AM, sunset 6:19 PM (computed from the trailhead location).
Forecast for the trailhead area from the U.S. National Weather Service, updated Oct 17, 12:46 AM. Mountain weather changes fast and can differ a lot by elevation: check the official forecast for your route before you go.
Recent conditions
Reports come from Arête members, not from land managers. They show when something was seen, not whether it is still true. Check official sources before you go.
No condition reports in the last 30 days. Conditions are unknown, not necessarily good.
Reviews
No reviews yet.
Frequently asked questions
How long is Chasm Lake Trail?
Chasm Lake Trail in Rocky Mountain National Park is 0.84 mi long, measured from its route geometry in OpenStreetMap data. Signed or official distances can differ.
How much elevation does Chasm Lake Trail gain?
Walking from the start to the end as drawn, it climbs about 354 ft and descends about 68 ft, between 11,529 ft and 11,818 ft. These are computed from the USGS 3DEP elevation model and can differ from other apps; the other direction swaps climbing and descending.
How hard is Chasm Lake Trail?
OpenStreetMap tags this trail "Mountain hiking" (sac_scale). That is a mapper's rating, not an official one.
How long does Chasm Lake Trail take?
About 25 min one way for a fit hiker, by Naismith's rule from the length and climb. It is an estimate: allow more for rest, photos, heat, altitude and weather.
Where does Chasm Lake Trail start?
The route starts near 40.2657, -105.5925 (Rocky Mountain National Park, Rocky Mountain Wilderness). Use the Directions button to open it in your maps app.
Are dogs allowed on Chasm Lake Trail?
Dogs are tagged as not allowed in OpenStreetMap. Rules can change by season and by land manager, so check posted signs and the official page.
Is there water, parking or a toilet at Chasm Lake Trail?
Mapped in OpenStreetMap near this trail: 0 water points, 0 parking areas, 0 toilets. Mapped water is not tested or guaranteed: carry your own. Fees and permits are not included here; check the official page.
Source
© OpenStreetMap contributors (ODbL). Overpass API extract: Boulder County, CO (hiking relations + named paths). Licence: ODbL 1.0. Data version osm-2026-10-16, imported 10/16/2026. View the source record
Trail data can be wrong or out of date, and Arête is not an emergency service. Check official sources, weather and closures before you go.