CalTopo

Pros

• Extremely powerful desktop web interface for detailed route planning.
• Advanced mapping layers including Map Builder Topo, Shaded Relief, and Slope Shading.
• Excellent for off-trail navigation and identifying potential water sources.
• Avoids aggressive marketing or 'scummy' business practices often attributed to competitors.
• Seamless integration between desktop planning and mobile navigation for field use.

Cons

• Mobile app is poorly suited for route planning; most users find it useful only for navigation.
• Steep learning curve due to high feature density and complex capabilities.
• Does not consistently distinguish between maintained and unmaintained trails.
• Map resolution can be lost when zooming out or attempting to print large areas on a single page.

Caveats

• Map scales (e.g., 1:62,500) can be deceptive; features like ridgelines may appear much narrower on the map than they are in reality.
• Users often supplement CalTopo with other apps to compensate for its mobile planning limitations.

Best for

• Advanced users planning off-trail or complex backcountry trips.
• Hikers who prefer detailed planning on a desktop and printing physical waterproof maps.
• Users who require specific topographic data like slope angle shading for safety.

Avoid if

• You perform the vast majority of your route planning exclusively on a smartphone.
• You prefer a simple, 'plug-and-play' interface with a shallow learning curve.