How long does it take to walk a half marathon?
About 4 h 22 min at an average 3 mph walking pace, or 3 h 45 min if you walk briskly at 3.5 mph. A half marathon is 13.1 miles. Walkers typically finish in 3.5–4.5 hours, so check the event cutoff before you enter.
Your time for a half marathon
13.11 miles · 21.10 km · about 29,900 steps at your height. Climbing uses Naismith's rule (+1 hour per 600 m / ~2,000 ft of ascent).
Time to walk a half marathon at common speeds
| Speed | Pace / mile | Time | Typical of |
|---|---|---|---|
| 2.0 mph · 3.2 km/h | 30:00 | 6 h 33 min | Stroll |
| 2.5 mph · 4.0 km/h | 24:00 | 5 h 15 min | Average |
| 3.0 mph · 4.8 km/h | 20:00 | 4 h 22 min | Brisk |
| 3.5 mph · 5.6 km/h | 17:09 | 3 h 45 min | Brisk |
| 4.0 mph · 6.4 km/h | 15:00 | 3 h 17 min | Power walk |
| 4.5 mph · 7.2 km/h | 13:20 | 2 h 55 min | Power walk |
| 5.0 mph · 8.0 km/h | 12:00 | 2 h 37 min | Race walk |
What changes the answer
Hills. Hiking guides use Naismith's rule: allow an extra hour for every 600 m (about 2,000 ft) of climbing on top of the flat-ground time. Enter your route's elevation gain above to include it.
Terrain. Rough trails, sand, snow and mud slow everyone down, often well beyond what the climb alone explains. Plan conservatively off-road.
Traffic lights and crowds. City walks are usually slower than a treadmill at the same effort because of crossings.
Fatigue. On long walks most people slow in the final miles; experienced walkers on Reddit's r/walking say the same. Breaks of 5–10 minutes an hour keep the overall pace steadier.
Fitness and age. Comfortable walking speed stays around 3 mph through middle age and drifts down after 60 — see average walking speed by age.
Want to know your own pace first? Time a mile and plug it into the walking pace calculator, or plan any route with the walking time calculator.
Questions walkers ask
How long does it take to walk a half marathon?
At an average pace of 3 mph, walking a half marathon (13.11 miles, 21.1 km) takes about 4 h 22 min. A brisk 3.5 mph cuts it to 3 h 45 min; a relaxed 2.5 mph stretches it to 5 h 15 min.
How long is a half marathon at a fast walk?
A fast power walk of 4 mph covers a half marathon in about 3 h 17 min, before any stops.
How many steps is a half marathon?
Most adults take 2,000–2,400 steps per mile, so a half marathon is roughly 26,200–31,500 steps. Taller walkers and faster paces sit at the low end.
How many calories does walking a half marathon burn?
At 3 mph on flat ground, about 1040 calories for a 150 lb (68 kg) person and 1387 for a 200 lb (91 kg) person, using Compendium of Physical Activities MET values. Hills and faster speeds burn more.
Can the average person walk a half marathon?
Many healthy adults can, especially with a few weeks of building up longer walks. Take breaks, carry water and expect your pace to drop in the final miles.