CalTopo: Backcountry Mapping

CalTopo: Backcountry Mapping

Route Planning & Navigation

7K ratings
116 reviews
#107 in free Navigation
🗺️ Navigation
Free

Details

  • Released
  • Updated
  • October 17, 2020
  • July 8, 2026
CalTopo: Backcountry Mapping screenshot #1 for iPhone
CalTopo: Backcountry Mapping screenshot #2 for iPhone
CalTopo: Backcountry Mapping screenshot #3 for iPhone
CalTopo: Backcountry Mapping screenshot #4 for iPhone
CalTopo: Backcountry Mapping screenshot #5 for iPhone
CalTopo: Backcountry Mapping screenshot #6 for iPhone
CalTopo: Backcountry Mapping screenshot #7 for iPhone
CalTopo: Backcountry Mapping screenshot #8 for iPhone
🖼️Get Icon
Icons↘︎

About

Plan and navigate off-grid adventures with detailed offline maps and real-time weather forecasts. Trusted by professionals, this app offers seamless syncing and collaborative planning for backcountry pursuits.

Offline map downloads
Satellite imagery
Route planning
GPS tracking
Weather forecasting
Collaborative map sharing
Slope angle shading
Show original description

What users say

See all reviews

What's New in CalTopo

1.27.1

July 8, 2026

Small bug fix

Charts

Top Free

📈 107+2

Navigation

This app rose +2 positions in Navigation chart.

Last updated on July 18, 2026.

Events

Read more about Plan Your Hike With Snap To

Plan Your Hike With Snap To

New! Tap to snap your route to trails & more

Aug 8, 2025 Sep 1, 2025

Read more about 3D is live on CalTopo

3D is live on CalTopo

Change your perspective with 3D mapping.

Oct 10, 2024 Nov 10, 2024

User reviews

Requires Account Creation

I hate this timeline.

Great Topo Map

I love how easy it is to mark up a map or see what the elevation is an any point.

iOS is CalTopo’s lowest priority

I’ve been using CalTopo since long before they created an app. It let me do things on a non-mobile no other mapping software can. I’ve been a subscriber for years. No more.

This app is garbage. If you need view-only access to your map library, it’s okay. If you’re actually making changes or re-planning what you’re going to hike/bike/paddle/whatever each day, you’ll pull your hair out.

All feature development is targeted at their web version. iOS is a buggy afterthought. Even Android has closer feature parity. Change can be good, but when it introduces bugs and they refuse to fix those bugs, you’ve got decay. Unfortunately, this app has crossed my personal threshold.

Here’s a shortlist of issues, much of which I’ve reported:
1) background location doesn’t work. They’re using too many resources and iOS is evicting them to save user battery (something it only does in extreme circumstances). Rather than fixing their problem, they post a “doesn’t work in low power mode” dialog. No other gps tracking software needs this dialog, CalTopo is just that embarrassing
2) related to this, when the app is killed by iOS (and not the user), it loses its mind. Expect to launch to a blank loading screen. You’ll need to force-quit or close and reload your map to get functionality again
3) no bulk edits. Managing a weeks-long trip and want to organize it better? Tough. Edit each and every waypoint manually (5 taps each)
4) disorganized export. If you want to sync data to an external device, good luck! That folder organization you just wasted your time on isn’t honored by the export pane. Every single waypoint out of possibly thousands is shown even for folders you’ve hidden.
5) corrupted imports. Yup, CalTopo (across platforms) doesn’t sanitize data. If you import perfectly function geojson that just doesn’t happen to use values CalTopo expects, you can end up with a corrupted map with items you can’t delete or even view properly
6) doesn’t honor visibility settings. On desktop and Android, labels are shown or not shown based on a folder setting. iOS doesn’t honor this
7) un-tappable POIs. The icon size you can set is below what CalTopo’s software understands how to let you tap. Since icon size is largely independent of viewport, you can’t even zoom in to fix this. Combine this with the always hidden labels and you can accidentally set yourself up with a map that is unusable on mobile
8) utterly broken caching. Been using weekly imagery to negotiate a tricky section of your adventure? I hope you aren’t traveling past cell coverage. This data is never cached. The second the app is exited (see above for how comment this is), you’ve lost your tool. Screenshots are about the only way around this
9) custom icons only work online. If your data set was imported from kml, you’re likely to have “custom” icons that point to Google’s servers. These also aren’t cached at all, meaning you’ll have a lot of [ ? ] icons all over your map.
10) broken offline tile management. The benefit of CalTopo is supposed to be its layer system. The problem is the lack of granularity on their caching tool. You can add layers one by one just fine, but you can’t remove them. If you’re trying to manage space on your device by removing the more detailed layers from early days in your trip while still retaining the base map, tough, you can’t. Delete is an all or nothing tool. This is extra fun because
11) CalTopo backs up their maps in your iOS backups. Yup. A properly functioning product would only back up your intentions (ie your data) and then redownload their tiles when needed (ie their data). Imagine if Netflix backed up offline movies to your iCloud account. You’d be pretty mad that your backup is taking so long, right?

I’m going to stop now because very few people are going to read this far (and CalTopo has already shown they don’t care by not fixing a single bug in years). Thanks for reading. I hope you are able to find software that actually works for you. CalTopo crossed my personal threshold for mismanagement when they decided to raise prices on me while I was on an expedition.
Show more

Map frequently crashing and resetting

The maps is generally usably, however I've noticed it crashing and resetting map when changing the sentinel weekly overlay visibility while on 3d mode. I've also experienced this when toggling slope angle shading on. I'm on iPhone 14 Pro, an I running out of RAM?

The Crosshairs suck

This is a great application, I especially like the slope contrast colors so you can instantly get an idea how steep a slope is. But, for some reason the crosshairs that tell you where something/you are at, are so ridiculously small and thin that you can’t really see them unless you stop and try really hard for a while - and you need to only be doing this when you are hiding in some shade (otherwise you will never see them if you are out in the sun). It makes it hard to use the map to see where you are or where something is, which is kind of the entire point of a map application. You would think they would have a way to make the crosshairs nice and big and bold and obvious or some other color or something, but nope.
Show more

User experience

🐞

Reported Bugs

4 issues

Trails and tracks disappearing

Bug

Coordinate display issues

Bug

Frequent app crashes and freezes

Bug

Incompatibility with older devices

Bug

Requested Features

5 requests

Add 3D map view

Feature

Implement route snapping to trails

Feature

Improve offline map download capabilities

Feature

Add photo geotagging functionality

Feature

Implement course-up map orientation

Feature

FAQ

What does the CalTopo app do?

The CalTopo app is a comprehensive tool for planning and navigating backcountry adventures. It allows users to download detailed maps and layers for offline use, view real-time location via GPS, and access weather forecasts. It's designed for off-grid pursuits and is trusted by professionals in outdoor fields.

What are the key features of CalTopo?

Key features include offline map downloads with satellite data, route planning and navigation, GPS tracking even when offline, and access to various map layers such as slope angle shading, public lands, and weather forecasts. It also supports collaborative map sharing and live tracking for group outings.

Is CalTopo free to use?

Based on the provided information, the CalTopo app is offered for free. There are no mentions of subscription fees, in-app purchases, or advertisements within the application's description.

What kind of maps can I access with CalTopo?

The app provides access to a wide array of map layers including MapBuilder Topo, Hybrid and Overlay, Forest Service Maps, Scanned Topos, Global Imagery, Shaded Relief, Slope Angle Shading, Parcel data, Public Lands, Weekly and NAIP Satellite Imagery, Sun Exposure, Marine Charts, Weather Forecasting, and Fire History/Activity, among others.

Who is the target audience for CalTopo?

This app is designed for individuals who engage in off-grid activities and require robust mapping and navigation capabilities. This includes professional mountain guides, avalanche educators, search and rescue teams, hikers, climbers, skiers, and anyone planning backcountry expeditions.