From collaborative map building to Location Sharing and offline adventuring, CalTopo is the one app that does it all.
Multiple editors | Real-time updates | Stackable Layers
Slope Angle Shading helps you avoid steep terrain when finding routes.
Hourly data from SNOTEL stations lets you know exactly what to expect.
Hi-res weekly and lo-res daily satellite images give a picture of current and changing conditions.
Water is heavy. Get real-time data for over 7,500 streams and reservoirs and pack a filter instead.
Elevation specific forecasts lets you know if if you need to pack that extra warm puffy.
Check if the route you're planning takes you across private land or keeps you in the clear.
The hassle of downloading and transferring GPX files between different apps is in the past.
Download maps and routes for offline use. Make edits in the field and have them update once you get reception.