Home Destinations France Auvergne-Rhône-AlpesGrand Colombier

Hard

Cycling

🇫🇷 France

Satellite

This track was identified and mapped via high-resolution satellite imagery.

ID: FR-ARA-28

Grand Colombier

Added on 10 Oct 2026

Logged by @trailx

Grand Colombier (1,498 m) is one of the great Tour de France climbs. The classic side starts in Culoz: 18.3 km at an average 6.9%, gaining about 1,254 m. The Artemare side has ramps of 22%. First Tour appearance: 2012 (5 times). Pogačar won the 2020 summit finish.

Trail Map

Initialising Map Engine...

Trail Profile

General Instructions

Season: Closed November to April. 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.

Mission Logs41 waypoints

Distance	Direction & Instruction	Gradient
0.0 km	N Start Point	4%
0.5 km	N Continue on track	8%
1.0 km	NE Continue on track	6%
1.5 km	W Steep Ascent	10%
2.1 km	NE Steep Ascent	11%

Note: Gear suggestions are based on terrain gradient and are for reference only.

Weather check

At Start

250m

Sampling Micro-Climate...

45.8476, 5.7809

Slide to preview conditions across the entire route • Point: 45.8476, 5.7809 @ 250m

Quick Stats

Distance

17.92 km

Type

Cycling Sector

Elevation Range

250m - 1490m

Max Elevation

1490 m

Max Gradient

28.4%

Highlights

Ride the Culoz side, the way the Tour climbs it
Top out at 1,498 m
Pogačar won the 2020 summit finish
The Artemare side has ramps of 22%

Field Radio Protocol

VHF-UHF Communication

Signal Verified

Emergency Simplex

146.520MHz

Team Coordination

446.006MHz

Scout Primary

146.400MHz

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

+1239 m

Total Descent

-0 m

Ruggedness Index

Terrain Roughness Index

Vertical displacement per km. Typical range: 0 (Smooth) to 100+ (Extreme Mountain).

0 (Smooth)50 (Steep)100+ (Extreme)

69.1

Tortuosity Index

Route Curviness Index

Ratio of actual path to straight line. Typical range: 1.0 (Direct) to 3.0+ (Switchbacks).

1.0 (Direct)2.0 (Winding)3.0+ (Serpentine)

2.81

Gradient Distribution

Flat (0-3%)5%

Moderate (3-8%)20%

Steep (>8%)76%

Surface & Hydrology

Paved99%

Unpaved1%

Surface Spectrum Analysis

Asphalt

99%

Dirt Track

Water Crossings

Includes only technical water fords where the vehicle actively enters a stream or riverbed. Permanent bridges are excluded from this count.

Difficulty Analysis

SCORE: 58

Difficulty is determined by a technical multi-vector analysis of elevation profile, surface quality, and topographic intensity.

Resulting CategoryHard

Bounding Box (WGS84)

MIN LAT: 45.847629

MAX LAT: 45.903630

MIN LON: 5.760519

MAX LON: 5.792010

Point Spacing: 22.3 m • Engine: TrailX Precision GPX ANALYTICS v1.0.0

Reviews & Discussion0

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Plan this trip

Before you go: Grand Colombier

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.