Phones run out of battery. GPS satellites get blocked by canyon walls. AllTrails works until the trail goes cold and the screen is too dim to read in midday sun. If you're going to spend more than a single afternoon in the backcountry, you need to be able to navigate with paper and a compass.
What to carry
- USGS topographic map of the area you're in (1:24,000 scale for trail use, or use a National Geographic Trails Illustrated map for popular parks — they're more durable and trail-current).
- A baseplate compass with a sighting mirror. Suunto MC-2 or Silva Ranger work. Skip the cheap clip-on compass — they're not accurate enough for serious work.
- Knowledge of declination for your area (the difference between true north and magnetic north — varies from 0 to 20 degrees across the US).
The five basic skills
1. Orient the map
Lay the map flat. Place the compass on the map with its base aligned to the north-south grid lines. Rotate yourself (and the map) until the compass needle points to the 'N' on the map. Now the map matches the terrain in front of you.
2. Take a bearing from the map
Place the compass with the long edge connecting your current location and your destination, direction-of-travel arrow pointing toward the destination. Rotate the bezel until 'N' on the bezel aligns with the map's grid north. Pick up the compass — the bezel reads your bearing in degrees.
3. Adjust for declination
If you're in California, true north and magnetic north are about 14 degrees apart. Add or subtract this offset depending on east/west declination (most US compasses have an adjustment screw — set it once for your trip).
4. Walk the bearing
Hold the compass flat in front of you. Rotate your body until the needle aligns with the bezel's north arrow ('red in the shed'). The direction-of-travel arrow now points where you should walk. Pick a feature ahead in that direction and walk to it. Repeat.
5. Triangulate to find where you are
If you're lost: identify two visible peaks. Take a bearing from each (sighting through the compass). Add 180 degrees to each (back-bearings). Draw lines on your map from each peak along those back-bearings. Where the lines cross is approximately your position.
The map and compass don't need batteries, don't fail in cold, don't break when dropped, and weigh under 100 grams. Every other navigation tool you carry should be a backup to them.
Modern blend
The right modern setup is paper map + compass as primary, GPS app (Gaia GPS, CalTopo, or onX Backcountry) on phone as secondary, with offline maps downloaded for the area. The phone is faster; the paper is reliable. Use both. Pack a battery bank.
The discipline that prevents lost
Check your position every 30 minutes when you're moving. Note landmarks. Look back as you go (the trail looks different in reverse). If you ever feel uncertain, stop and orient before you continue.
For trail-ready accessories including compasses and maps, shop our tools and survival kit.