Boulder-Grand Pass trail (unmaintained)
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
No access details are tagged for this trail yet, so they are unknown. Check posted signs and the land manager before you go.
Access details come from OpenStreetMap tags and can be missing or out of date.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
- Boulder County official page ↗ · Boulder County on Arête
Details
| Length | 0.28 micomputed |
|---|---|
| Route type | Unknownunknown |
| Surface | Unknownunknown |
| Difficulty | Demanding mountain hiking (OSM sac_scale)from source |
| Elevation gain | 11 ftcomputed |
| Elevation loss | 424 ftcomputed |
| Highest point | 12,048 ftcomputed |
| Lowest point | 11,623 ftcomputed |
| Estimated duration | about 5 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
- Boulder-Grand Pass Trail1.15 mi · 1.3 mi away
- Box-Eagle Lakes Route1.13 mi · 1.3 mi away
- Lion Lake Trail2.10 mi · 2.5 mi away
- Bluebird Lake Trail1.78 mi · 2.8 mi away
Weather at the trailhead
Today: sunrise 7:14 AM, sunset 6:20 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 Boulder-Grand Pass trail (unmaintained)?
Boulder-Grand Pass trail (unmaintained) in Rocky Mountain National Park is 0.28 mi long, measured from its route geometry in OpenStreetMap data. Signed or official distances can differ.
How much elevation does Boulder-Grand Pass trail (unmaintained) gain?
Walking from the start to the end as drawn, it climbs about 11 ft and descends about 424 ft, between 11,623 ft and 12,048 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 Boulder-Grand Pass trail (unmaintained)?
OpenStreetMap tags this trail "Demanding mountain hiking" (sac_scale). That is a mapper's rating, not an official one.
How long does Boulder-Grand Pass trail (unmaintained) take?
About 5 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 Boulder-Grand Pass trail (unmaintained) start?
The route starts near 40.2250, -105.6689 (Rocky Mountain National Park, Rocky Mountain Wilderness, Boulder County). Use the Directions button to open it in your maps app.
Are dogs allowed on Boulder-Grand Pass trail (unmaintained)?
Not tagged in OpenStreetMap, so it is unknown. Check posted signs and the land manager's website.
Is there water, parking or a toilet at Boulder-Grand Pass trail (unmaintained)?
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.