Rate and fix the mountain bike trails on OpenStreetMap.
See every trail colored by difficulty, give unrated ones an IMBA rating, draw trails that are missing and group them into trail systems. Your edits go to OpenStreetMap, so they show up in the apps and maps that use it.
No account? Create one on OpenStreetMap; it's free.
Pick the state or province to load its trails. You can add more later from the Map window.