This track was identified and mapped via high-resolution satellite imagery.
Col du Télégraphe
Col du Télégraphe (1,566 m) is one of the great Tour de France climbs. The classic side starts in Saint-Michel-de-Maurienne: 11.8 km at an average 7.2%, gaining 846 m. The usual lead-in to the Galibier. First Tour appearance: 1911 (37 crossings since 1947).
Trail Map
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Trail Profile
General Instructions
Season: Open all year (Valloire resort road). Carry a windproof layer for the descent, enough water and food for the climb, and check road status before you go. Descend with care: these are open roads shared with cars and motorbikes.
Weather check
Sampling Micro-Climate...
45.2179, 6.4751
Slide to preview conditions across the entire route • Point: 45.2179, 6.4751 @ 742m
Quick Stats
Highlights
- Ride the Saint-Michel-de-Maurienne side, the way the Tour climbs it
- Top out at 1,566 m
- The usual lead-in to the Galibier
- Ride a climb from the 2026 Tour de France
Field Radio Protocol
VHF-UHF Communication
Propagation Telemetry
Ridge Line
92%Gorge Floor
18%Sector Relay: Sector Alpha Relay• 12-18 KM Range
Regulatory Compliance
VHF/UHF frequencies are for monitoring and emergency coordination only. Transmitting on these bands may require an Amateur Radio License or regional government permits. Check local telecommunications laws before operation.
Technical Analysis
Total Ascent
+843 m
Total Descent
-30 m
Ruggedness Index
Terrain Roughness Index
Vertical displacement per km. Typical range: 0 (Smooth) to 100+ (Extreme Mountain).
67.6
Tortuosity Index
Route Curviness Index
Ratio of actual path to straight line. Typical range: 1.0 (Direct) to 3.0+ (Switchbacks).
4.42
Gradient Distribution
Surface & Hydrology
Surface Spectrum Analysis
Includes only technical water fords where the vehicle actively enters a stream or riverbed. Permanent bridges are excluded from this count.
Difficulty Analysis
Difficulty is determined by a technical multi-vector analysis of elevation profile, surface quality, and topographic intensity.
Bounding Box (WGS84)
Point Spacing: 10.6 m • Engine: TrailX Precision GPX ANALYTICS v1.0.0
Reviews & Discussion0
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Plan this trip
Before you go: Col du Télégraphe
Best time to go
Apr, May, Jun, Sep, Oct
Mid-June to mid-September is the season for high Alpine routes such as the Tour du Mont Blanc; huts are generally open then and passes are mostly clear of snow. Lower routes around Lyon and the Drôme are good in spring and autumn.
Navigate it offline
Download this trail and its map in the free TrailX app for turn-by-turn guidance, off-route alerts and GPS recording without signal.
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Trails near Col du Télégraphe
Col du Galibier
6.9 km from this trail
Col de la Croix de Fer
12.1 km from this trail
Col de la Madeleine
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Col du Glandon
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Col de la Loze
27.1 km from this trail
Hautes-Alpes High Pass Hike
29.0 km from this trail