The west ridge is a documented alpine route on Jägihorn. It is a mountaineering line on mixed rock and alpine terrain, not a trekking route. The ridge character implies exposed movement and route-finding, with difficulty depending on snow cover and rock conditions. It is generally considered a serious but moderate alpine climb in the Bernese Alps wide sense. I could not verify reliable published figures for ascent gain, route length, or times, so those are omitted.
Route Outline
Approach to the west side of Jägihorn
Gain the west ridge
Follow the ridge crest over mixed alpine ground
Summit of Jägihorn
Descend by the same route or an established descent line
