The Hiking World

Colonel Bob Trail #851

Colonel Bob Trail #851 — tail catalogue entry from OSM relation 18213686. Geometry and elevation are OSM/GLO-30 and provisional. No special permit known; verify locally.

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Distance 15.1 km Reported · Ascent provisional (DEM sample) · High point provisional (DEM sample) · T2 · pin

Itinerary not published

Last checked 2026-09-24

Cite this record

The Hiking World, Colonel Bob Trail #851, read 2026-09-24, https://www.thehikingworld.com/trails/colonel-bob-trail-851

How we verify · last checked 2026-09-24

Byline

  • The Hiking World editorial team · author
Colonel Bob Trail #851

Figures marked provisional are seed data and still need verification. Source and last-checked date sit under each cited value.

Forecast at page generation, 2026-11-07T06:12:45.987Z

Representative point on Colonel Bob Trail #851: 47.488°, -123.793°, about 1352 m. A forecast, not a trail-surface reading.

Source Open-Meteo. Mountain weather changes with elevation and aspect.

Life-safety notices on this page come from the issuer.

Altitude weather delta

High 1,352 m minus low 98 m is 1,254 m of relief on this record. A standard tropospheric lapse of 6.5 °C per 1,000 m implies about 8.2 °C cooler at the high point than the valley, all else equal.

That is a model (International Standard Atmosphere environmental lapse), not a forecast and not a trail-closure. Wind, snow, and storms stay in Hazards.

derived:lapse-rate · read 2026-09-10 · provisional

ISA 6.5 °C / 1,000 m · wikipedia.org · 2026-09-10

Stored line for Colonel Bob Trail #851, from 47.478°, -123.741° to 47.488°, -123.746°. The drawing is the simplified record, not a surveyed GPS track.

Map loads when this section is on screen.

GeoJSON

This line is a schematic. The files are not a GPS track. GPX · GeoJSON

Facts47.478, -123.741
Distance15.1 km*
osm-2d (provisional; not walking distance) · read 2026-09-23
Ascent+1,813 m*
copernicus-dem:glo-30 · read 2026-09-24 · provisional
Descent1,407 m*
copernicus-dem:glo-30 · read 2026-09-24 · provisional
High point1,352 m
copernicus-dem:glo-30 · read 2026-09-24 · provisional
Low point98 m
copernicus-dem:glo-30 · read 2026-09-24 · provisional
Routepoint-to-point
Daysnot published
Seasonunverified
GradeUngraded (tail ingest)

Catalog entry

DifficultyUngraded (tail ingest)
SAC T2
Mountain hiking. Continuous trail, some steep ground, sure-footedness helpful.
YDS Class 1
Class 1. Walking on an established path; low fall risk.
Elevation
100726135214.32 km profile length (DEM sample)

Stored distance is 15.1 km. The chart axis follows the DEM sample (14.32 km), not the published line length.

Tail catalogue entry built from OpenStreetMap relation 18213686 (ODbL). The stored line is the OSM geometry, decimated; its 2-D length is provisional and not published as walking distance.

Elevation high/low and ascent/descent are Copernicus GLO-30 samples at the line vertices (copernicus-dem:glo-30) and remain provisional.

No special permit was researched for this trail. Permit is marked unverified — confirm locally before relying on it.

Water

No water sources recorded.

Permits & fees

Conditions, fees and rules change. Confirm with the issuer and local authorities before you go. This is a reference, not a substitute for local advice. Terms

Permit status is unverified.

Getting there

No sourced gateway chain yet.

Getting there car-free

  • Colonel Bob Trail #851 (start): car-free flag unknown.
  • Colonel Bob Trail #851 (end): car-free flag unknown.

Trailheads

  • Colonel Bob Trail #851 (start) car-free: unknown
  • Colonel Bob Trail #851 (end) car-free: unknown

Questions

Do I need a permit for Colonel Bob Trail #851?

Permit status is unverified for Colonel Bob Trail #851. This desk does not assert that a walking permit is or is not required.

How difficult is Colonel Bob Trail #851?

Colonel Bob Trail #851 is graded SAC T2 · YDS 1.

How long is Colonel Bob Trail #851?

The length on this record is 15.1 km (reported). Published figures may differ. See /guides/how-long-is-the-trail

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