Topographic Maps
These topographic maps, one for each region, are hosted by CalTopo.   The maps have lots of capabilities such as:
  • Choice of base map
    • Topo maps from USGS, Map Builder and US Forest Service
    • Road, Terrain and Satellite maps from Google
    • Open Street Maps
  • Optional overlays
    • Land Management (Government ownership boundaries)
    • Historic and present fire activity
    • Water gauges (Is it safe to ford?)
  • Ability to import and export data (Download tracks)
  • Configure what tracks and track names are displayed
  • More
​This is only a small part of how CalTopo can be customized.  For a much better description click "CalTopo" in the upper left menu of a CalTopo map and choose "Guided Tour".  Be sure to use the page arrows at the bottom of the CalTopo Tour screen.
Enjoy.  CalTopo is quite flexible.  Maps with a lot of tracks take forever to load.  You may need patience on some of them.