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Find north with a stick and shadow
You can use a stick and its moving shadow to estimate north when you have sunlight but no working compass. Marking the shadow tip twice gives you an approximate west-to-east line, with the first mark generally west of the second. Stand with west on your left and east on your right to face approximately true north, rather than magnetic north. This is a rough direction-finding aid: a short shadow track is not an exact east-west line, and the method is not dependable everywhere or at every time of day.
Topic summary
You can use a stick and its moving shadow to estimate north when you have sunlight but no working compass. Marking the shadow tip twice gives you an approximate west-to-east line, with the first mark generally west of the second. Stand with west on your left and east on your right to face approximately true north, rather than magnetic north. This is a rough direction-finding aid: a short shadow track is not an exact east-west line, and the method is not dependable everywhere or at every time of day.
Key takeaways
- The stick remains upright and unmoved throughout the wait.
- Both stones identify distinct shadow-tip positions on the same level surface.
- You can identify the first mark confidently and keep it to your left when facing your estimated north.
- Your estimated direction broadly agrees with an independent true-north reference.
- Avoid: Using sloping or uneven ground distorts the result, so move to a flat, level patch.
- Avoid: Letting the stick lean or shift changes the reference, so set it upright and firmly before making either mark.
Intended uses
- Navigation skill (Beginner, ~15 min practice)
- Requires: Watch or timer, optional for timing the wait, Compass, optional for checking your practice result
Climate suitability
Choose open, flat, level ground with direct sunlight and enough space for the entire shadow to move unobstructed. The method works in both hemispheres under suitable conditions, but high-latitude summer sunlight, especially near midnight, can make the usual west-to-east assumption unreliable.
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Required tools
- Watch or timer, optional for timing the wait
- Compass, optional for checking your practice result
Required materials
- Straight stick long enough to cast a distinct shadow
- Two small stones
- Bare soil or sand suitable for holding the stick upright
Step-by-step
Push a straight stick vertically into flat, level ground in the sun.
Why: 1. Push a straight stick vertically into flat, level ground in the sun. An upright, stationary stick and level surface reduce distortion and keep both shadow marks comparable.
Mark the tip of the shadow with a small stone. Wait 15-20 minutes.
Why: 2. Mark the tip of the shadow with a small stone. Wait 15-20 minutes. A precise first mark establishes your reference, and the wait lets the shadow move far enough to distinguish a second position.
Mark the new tip of the shadow with a second stone.
Why: 3. Mark the new tip of the shadow with a second stone. Marking the same part of the shadow tip preserves the direction of movement rather than mixing movement with marking error.
The line between the two stones runs west-to-east; first stone is west.
Why: 4. The line between the two stones runs west-to-east; first stone is west. Treat this as an approximate west-to-east line under suitable conditions, because the shadow tip follows a curved path and a short segment can depart substantially from true east-west.
Stand with the first stone at your left foot and the second at your right — you're facing north.
Why: 5. Stand with the first stone at your left foot and the second at your right — you're facing north. Putting approximate west on your left and east on your right orients you toward approximate north; if the marks are close together, stand behind them facing perpendicular to their connecting line.
Tip: Longer wait, more accurate line. This works anywhere the sun casts a shadow.
Common mistakes
- Using sloping or uneven ground distorts the result, so move to a flat, level patch.
- Letting the stick lean or shift changes the reference, so set it upright and firmly before making either mark.
- Marking a fuzzy edge or the middle of the shadow introduces error, so consistently mark the tip cast by the top of the stick.
- Reversing the marks reverses your direction, so identify the first stone clearly before waiting.
- Assuming a longer wait guarantees accuracy confuses wider spacing with better alignment, so use extra time to reduce marking error but still treat the direction as approximate.
Troubleshooting
- If clouds obscure the tip, then wait for a distinct shadow rather than guessing its position.
- If the marks are too close to define a line clearly, then wait longer and mark the tip again without moving the stick.
- If the stick moves or either stone is disturbed, then reset the setup and start again.
- If your result conflicts with reliable map or compass information, then check your setup and use the more reliable reference rather than forcing agreement.
Field practice drill
Allow about 20 minutes for one practice round. Set the stick, mark the first tip, and wait at least 15 minutes before marking the second; then face your estimated north and choose a distant landmark in that direction. Check against a known true-north reference, or a compass with local magnetic declination accounted for, and repeat at another time of day to see how the estimate varies.
Indicators of success
- The stick remains upright and unmoved throughout the wait.
- Both stones identify distinct shadow-tip positions on the same level surface.
- You can identify the first mark confidently and keep it to your left when facing your estimated north.
- Your estimated direction broadly agrees with an independent true-north reference.
Related outdoor skills
Educational reference only. Wilderness conditions change fast — practice in low-stakes settings, take a certified wilderness first-aid course, and confirm regional regulations before you rely on any of these skills in the field.