Field guide · Skills
Phones die, GPS glitches, batteries freeze. The overlander who can read a paper topo map navigates anywhere with confidence — and enjoys the terrain far more along the way.
Contour lines tell you everything
A contour line connects points of equal elevation. The closer the lines, the steeper the ground. Learn to read them and a map stops being paper and becomes a 3D model you can hold in your hands.
- Close lines = steep; wide lines = gentle.
- V shapes in lines point UP-canyon (streams, valleys).
- A shapes point DOWN-canyon (ridges and summits).
- Closed circles are peaks — or depressions; check the index numbers.
- Every fifth line is an index line with the elevation labeled.
Navigation without electronics
With a map and a compass you can figure out where you are: identify two landmarks you can see, take bearings on both, and your position is where the lines cross. It's a skill that takes an afternoon to learn and a lifetime to polish.
The route-planning trick
When scouting a route, trace your line and count how many contour lines you cross per mile. Each line is a climb. A trail that crosses 40 lines in 3 miles is going to earn its views. Use that same reading to plan water crossings — drainages converge where contours pinch together.
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