Follow an old iron railway for 25 km through dense Basque woodland, tunnels and riverside villages on a guided mountain bike ride from San Sebastián. This private tour pairs easy grades with a traditional Basque picnic and tailored pacing for all levels.
More ways to explore the area's outdoor wonders
You push off from a quiet lane outside San Sebastián and the city noise dissolves into pine and river song. The old iron railway—now a graded 25 km bike corridor—threads through deep woodland, slides through short, timeworn tunnels and opens into small Basque villages where stone houses watch riders pass.
Difficulty
moderate
Duration
4–5 hours
Fitness Level
Suitable for riders with basic cycling fitness who can handle 25 km of mixed gravel at an easy-to-moderate pace; the guide adapts distance to group level.
Wildlife
History
The corridor follows a 19th-century industrial railbed that moved iron from inland mines to coastal processing—its gentle grades reflect freight-era engineering tied to Basque industry.
Conservation
Riders pass sensitive riparian zones; stick to the graded trail, pack out all trash and avoid trampling banks to protect spawning habitat and stream-side vegetation.
Reserve your spot on the The Train Track Trail Mountain Bike Ride - Private experience today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring swimwear
Pack a lightweight swimsuit and quick-dry towel—there’s a popular river spot to cool off at the end of the ride.
Use the provided helmet and check fit
Premium helmets are supplied but make sure it fits snugly; correct fit reduces jostle through short tunnels and gravel sections.
Hydrate and time your start
Start in the morning during summer to avoid peak heat and carry at least 1–2 liters of water—refill points are limited on the trail.
Bring a compact light
Some short tunnels are unlit—carry a small headlamp or phone light for visibility and photo opportunities.
Helmet (provided)
A properly fitted helmet is required and provided by the operator.
Hydration pack or water bottles
Carry 1–2 liters; refill options along the route are limited.
Quick-dry swimwear and towel
Useful for cooling off in the river at the ride’s finish.
summer
Compact headlamp or phone light
Illuminates short, unlit tunnels and improves visibility in wooded sections.