812Trail Run from Les Houches to Les Plans
From Les Houches · Auvergne-Rhône-Alpes, France
Crosses into Italy and Switzerland
To Les Bossons · Auvergne-Rhône-Alpes, France
One way: it ends 5.9 km from the start in a straight line, so plan how you get back.
Community route · Hiking · Saved 11 Aug 2026
180.6 km · +8,432 m · 51h 59m · one way · Hiking
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812Trail Run from Les Houches to Les Plans is a 180.6 km hike point-to-point route from Le Bourgeat near Les Houches, with 8432m of climbing and an effort score of 265.
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Route briefing
What comes next
Climbs and descents in route order. Not listed does not mean absent: it may not be mapped.
Start
0 m
Le Bourgeat
Start
Route geometry · source 2026-08-11
About 0 min in
180.6 km remaining
+8432 m remaining
Climb
24.9 km
1243 m climb
14.9 km at 8.3% average
Saved route geometry · source 2026-08-11
About 7h 10m in
155.7 km remaining
+7702 m remaining
Climb
70.4 km
663 m climb
4.8 km at 13.7% average
Saved route geometry · source 2026-08-11
About 20h 16m in
110.2 km remaining
+5210 m remaining
Climb
132.7 km
758 m climb
5.8 km at 13.0% average
Saved route geometry · source 2026-08-11
About 38h 11m in
48.0 km remaining
+2713 m remaining
Descent
138.5 km
1146 m descent
12.2 km at 9.4% average
Saved route geometry · source 2026-08-11
About 39h 52m in
42.1 km remaining
+1934 m remaining
Climb
150.7 km
1895 m climb
12.2 km at 15.6% average
Saved route geometry · source 2026-08-11
About 43h 22m in
30.0 km remaining
+1934 m remaining
Finish
180.6 km
Route finish
Finish
Route geometry · source 2026-08-11
About 52h 00m in
0 m remaining
Turn this into a multi-day trip
Balance the route into daily stages, move overnight points, then share one plan with GPX, offline maps, and navigation for every day.
Terrain & grades
80% at ≤15% gradeThis point-to-point packs 47m of climb per kilometre, which makes it a hilly endurance profile. 80% of the measured line is at 15% grade or less (slope only, not surface or technicality). The hardest kilometre is around km 160, gaining about 335m. Total route distance is 180.6 km.
Snow & conditions
Snow not assessedCurrent snow evidence is not available for this route. Missing data does not establish snow-free conditions. This route reaches 3270m, where seasonal snow may linger.
Route sections
Epic effort, estimated around 51h 59m moving time using a hike model: 12:00 min/km flat pace plus about 14h 20m for 8432m of climbing. Expect 9% steep-grade exposure.
Fuel & gear
Plan roughly 279 small fuel units, then adjust for weather, aid, and personal effort.
Surface
Surface classes from OpenStreetMap, matched to the line. Ways without a surface tag are classed by their road type, so this is an estimate.
Path difficulty, as tagged in OpenStreetMap
- T1 hiking: 11.4 km
No difficulty tag on 39.4 km of path or track: unknown, not easy.
The SAC hiking scale mappers give each path. It is not a check of exposure, the weather or snow on the day.
On roads with traffic: 30.3 km in 18 stretches (the longest 5.3 km). Roads of class tertiary or bigger in OpenStreetMap; crossings and stretches under 100 m are not counted.
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