About Tarnoo

What Tarnoo is

A tarn is a small mountain lake. Tarnoo is an outdoor route planner: plan a route for hiking, running, cycling, gravel, mountain biking, road cycling or e-biking, and get a proper elevation profile, a surface breakdown and a sensible estimate of time and difficulty.

What is in it

How it is built

Everything runs on open data. Maps, paths, routes and highlights come from OpenStreetMap (ODbL). Route calculation runs on our own server, so your route is not handed to a third party.

What is not in it

No advertising, no trackers, no analytics, no profiling. We do not sell your data. The only cookies are the ones for signing in and your language — which is why there is no cookie banner.

Work in progress

Tarnoo is young and moving fast. Features change, and there are certainly rough edges left. Feedback is welcome.

See also the privacy policy and the terms of use.

8/20/2026