Making a map in the forest comes down to five core skills: finding your direction, measuring distances on foot, sketching landmarks to scale, and connecting everything on paper. You don’t need expensive equipment. A pencil, some paper (graph paper is ideal), and a compass will get you surprisingly far. Here’s how to do it step by step.
Decide What Your Map Needs to Show
Before you start walking and sketching, answer a few practical questions. How much area are you covering: a campsite and its surroundings, or a full trail system? Who else will use this map, just you or a group? And what matters most: water sources, trails, shelters, elevation changes, or hazard areas?
These choices determine how detailed your map needs to be. A rough sketch for a weekend campsite is a very different project than a detailed trail map you’ll hand to other hikers. Start simple. You can always add detail on a second pass once you have the basic shape of the land down on paper.
Find Your Cardinal Directions
Every useful map needs to be oriented to north. If you have a compass, this is straightforward. If you don’t, a shadow stick works remarkably well.
Push a straight stick vertically into flat ground where it casts a clear shadow. Mark the tip of the shadow with a small rock or scratch in the dirt. Wait 15 to 30 minutes and mark the new shadow tip. The first mark is roughly west; the second mark is roughly east, because the sun moves from east to west, pushing shadows the opposite direction. A line between those two points gives you an east-west reference.
For a more precise reading, mark the shadow tip in the morning and use a length of string tied to the stick to scribe an arc on the ground at that shadow’s length. As the sun climbs, the shadow shortens and pulls away from the arc. After midday, the shadow lengthens again and eventually touches the arc a second time. The line connecting those two intersection points is a true east-west line. If you stand with your left foot on the morning mark and your right foot on the afternoon mark, you’re facing north (in the Northern Hemisphere). This method gives you true north, which is slightly different from magnetic north on a compass but perfectly accurate for a field map.
Measure Distance by Pacing
You won’t have a measuring tape in the forest, but you always have your stride. Pacing is the standard field method for estimating distance, and it’s been used by surveyors and military navigators for centuries.
One “pace” equals two steps: you start on your dominant foot and count each time that same foot hits the ground again. To calibrate, walk a known distance (a football field, a pre-measured 100-foot stretch) at your normal hiking stride and count your paces. Divide the known distance by the number of paces. If 100 feet takes you 20 paces, your pace length is 5 feet.
In the forest, your accuracy will drop compared to flat ground. Brush, slopes, uneven terrain, and fatigue all shorten your stride. Oregon State University’s forestry extension rates pacing as the least accurate distance tool available, ranging from “moderately accurate to very crude.” You can improve it by keeping a consistent walking speed, counting carefully, and adjusting for slopes (uphill steps are shorter, downhill steps are longer). For a hand-drawn field map, this level of precision is usually enough to get relative distances right.
Set Up Your Paper and Scale
Graph paper with a quarter-inch grid makes field mapping dramatically easier because it gives you a built-in measurement system. Before you start sketching, pick a scale. For a small area like a campsite, one grid square might equal 10 feet. For a larger trail system, one square might equal 100 feet or more.
Write your scale in the margin so you (or anyone else) can interpret the map later. Something as simple as “1 square = 50 feet” works. The key is consistency: once you pick a scale, every distance on the map needs to follow it. If your pace tells you the distance between two trail junctions is 300 feet, that should be six squares at a 50-feet-per-square scale.
Orient your paper so the top edge points north. Draw a small arrow in the corner labeled “N” to mark this. Every feature you add should be placed relative to this orientation.
Plot Landmarks and Features
Start from a fixed point you can return to: your campsite, a trailhead, a distinctive tree, or a stream junction. Mark it on your paper near the center so you have room to expand in every direction.
From that starting point, walk toward a visible landmark. Use your compass (or shadow stick direction) to note which bearing you’re traveling, and count your paces to measure the distance. When you reach the landmark, plot it on your paper at the correct distance and direction from your starting point. Then repeat: pick the next visible feature, walk to it, record bearing and distance, and add it to the map.
As you move through the forest, sketch in the features you pass along the way: streams, rock outcrops, trail forks, clearings, steep slopes, fallen trees blocking a path. Use simple symbols and create a quick legend in the margin. Wavy lines for water, small triangles for rocks, dashed lines for trails, circles for notable trees. Keep it consistent so the symbols mean the same thing everywhere on the map.
Use Triangulation to Fix Your Position
If you can see two or three landmarks that are already on your map (a hilltop, a distinctive dead tree, a lake shore), you can pinpoint exactly where you’re standing without walking to any of them.
Take a compass bearing to each landmark. Then reverse each bearing by adding or subtracting 180 degrees (this is called a back azimuth). On your map, draw a line from each landmark along its back azimuth. Where two lines cross is your approximate location. A third bearing line makes this more reliable, because the three lines will form a small triangle rather than a single point, and you know you’re somewhere inside that triangle.
This technique is especially useful in forests with limited visibility. Any time you reach a ridge or clearing where you can spot known features in the distance, take bearings and confirm your position on the map before heading back under the canopy.
Showing Hills and Valleys
Representing elevation on a flat piece of paper is the trickiest part of field mapping, but even a rough version is valuable. Professional maps use contour lines, where each line connects points of equal elevation. You can do a simplified version in the field.
When you notice the ground rising or falling as you walk, mark the slope direction on your map with small arrows pointing downhill. If you want to attempt actual contour lines, pick a consistent elevation interval (every 50 feet of rise, for example) and estimate where those transitions occur as you walk. A few rules keep contour lines realistic: they never split into two, they never cross each other, they always point upstream when they cross a valley, and they form closed loops around hilltops.
For most practical forest maps, you don’t need precise contour lines. Simply noting “steep slope,” “ridge,” or “flat bottom” in the relevant areas gives anyone reading the map a useful picture of the terrain.
Protect Your Map From the Elements
Paper and forests are not natural friends. Rain, humidity, sweat from your hands, and morning dew can destroy hours of work. The simplest protection is a zip-close plastic bag. You can still write through thin bags with a ballpoint pen if you press firmly, or just pull the map out during dry moments to add notes.
For a more durable option, laminate your finished map using clear adhesive contact paper. Cut two pieces larger than your map, peel off the backing, and press them together with the map sandwiched between. This creates a water-resistant, tear-resistant surface that holds up to repeated folding and handling. If you’re building the map over multiple days and need to keep adding to it, stick with the plastic bag method until you have a final version worth laminating.
Refining Your Map Over Multiple Trips
A good field map is rarely finished in one outing. Your first pass captures the major landmarks, trail routes, and general shape of the area. Each subsequent visit lets you fill in gaps, correct distances that felt off, and add smaller features you missed the first time.
Carry your working map every time you enter the area and compare what you see to what you’ve drawn. When something doesn’t match, trust your eyes and update the map. Over time, you’ll build a document that’s genuinely useful for navigation, far more detailed for your specific patch of forest than any printed topographic map would be.