Why gravel route times vary so much

A mixed route needs mixed assumptions

Estimate distinct sectors instead of one average speed.

A gravel route can move from tarmac to hardpack, loose stone, rutted track and grass within a few kilometres. Those surfaces do not support one stable pace. Even two tracks labelled gravel may ride differently because one is firm and graded while the other is deep, broken or interrupted.

Break the route into broad sectors and describe each one. Separate linking roads, sustained firm tracks, rougher technical ground and sections likely to be walked. Use timings from your own recent rides on comparable surfaces so fast kilometres do not conceal slow ones.

Gradient belongs inside each sector. A compact track on level ground and the same track on a steep climb create different speed limits. On loose ascents, traction may set the pace before fitness does. On rough descents, braking and line choice may prevent the time that an elevation profile appears to return.

The route changes between rides

Rain can alter both speed and rideability.

Some stone-based tracks remain firm after rain. Others hold water, expose ruts or develop deep mud. Dry spells can harden one route while leaving another loose and dusty. Wind affects exposed roads and open moorland, while heat or cold changes the stops and supplies a rider needs.

Look for dated route notes and current land-manager information, then judge how closely they match recent weather. A photograph proves what a surface looked like at one time, not what it will do today. Where the route depends on a crossing, seasonal track or forestry road, identify an alternative before departure.

Elapsed time is not moving time

Gates, junctions and small problems accumulate.

Gravel routes often cross working landscapes and mixed networks. Gates, barriers, road crossings and unsigned junctions break the ride into pieces. Mud can require a stop to clear a wheel. A puncture, loose bag or bottle refill takes the same clock time whether the route is fast or slow.

Group rides add their own rhythm. Riders regroup after descents, wait at junctions and move at different speeds on road and rough ground. A larger group can take longer to pass through a gate even when its moving pace matches a smaller one. Include planned food stops and a realistic allowance for route checks in the elapsed-time decision.

Use evidence without pretending certainty

Create a range and update it at known points.

Consider a route with a road approach, a firm climbing track, a rough upland crossing and a road return. Treating those four sectors as one average hides the part most likely to control the day.

• Road approachAnchor it to recent rides with a similar load and group rather than an unladen best pace.
• Firm climbUse comparable gradient and surface, allowing for traction where the track steepens.
• Rough crossingGive technical descents, carries and uncertain ground their own cautious range.
• Whole journeyAdd gates, food, navigation and repairs as stopped time instead of hiding them inside riding pace.

Check progress before entering the committed sector. If the early sections are already outside the range, take the planned shorter line while it remains practical.

A useful estimate is a range with reasons, not a finish-time promise. Record what actually slowed the ride. That evidence improves the next estimate far more than adopting a generic gravel average from another rider or region.