West Twin Old Growth

Loop: 1.2 km
Elevation gain: Approx. 50 m
Walking time: Unconfirmed
Difficulty: Easy

loop

https://hikingprincegeorge.com/hikes/west-twin-old-growth

Elevation along the outing

Full loop

Start: Published roadside trail access · Finish: Published roadside trail access (1.3 km mapped).

Approximate ground elevation from a 90 m terrain model. Distance follows the mapped itinerary and may differ from published walking distance. This is a terrain-model profile, not a surveyed measurement. Any ascent total is identified separately with its own source or estimation method.

How the route order was checked

The named interpretive loop is closed in the OSM source. Its approach meets the loop at the exact same source coordinate. Walking the approach, closed loop and reversed approach produces a continuous 1.263 km outing, consistent with the tourism guide’s approximately 1.2 km complete circuit. The approach begins within 87 m of the historical published parking point; no parking-to-trail connector is invented.

Copernicus GLO-90 terrain elevations via Open-Meteo (CC BY4.0); linework: Open Database License (ODbL) 1.0

Copernicus DEM 2021 GLO-90 via Open-Meteo. Linework source: https://www.openstreetmap.org/way/405401665. Sampled and rounded for display.

Source: https://open-meteo.com/en/licence

Licence: CC BY4.0 elevation data; Open Database License (ODbL) 1.0 linework · https://creativecommons.org/licenses/by/4.0/

Profile source checked: 2026-10-18

How the elevation gain was established

Outing: loop outing from Published roadside trail access; 1.26 km along the mapped itinerary

Copernicus DEM 2021 GLO-90 via Open-Meteo (90 m resolution). v7-smoothed-ascent-1: interpolate retained terrain samples at 100 m spacing; apply one triangular 1:2:1 smoothing pass over ±100 m; preserve start, finish and documented turnaround heights; sum uphill excursions with a 5 m reversal threshold; round to nearest 10 m.

Approximate terrain-model ascent, not a field or GPS measurement. Coarse cells and smoothing can miss small climbs, switchbacks, structures and sharp terrain. Processing sensitivity is not a statistical confidence interval.

Sources checked 2026-10-19.