https://caltopo.com/

Plan Your Next Adventure

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

Plan Your Next Adventure Together, Even When You're Miles Apart

Multiple users can edit the same map at the same time. Edits will appear in real-time for all users.

It's not just "sharing" maps. We're talking real collaboration.

Transition seamlessly between your computer and mobile.

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.

Caltopo Supports First Responders

First responder discounts are for active first responders who are current with an agency and have a need for mapping in their response.