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How to Estimate Hiking Time and Effort
Naismith's Rule for a time budget, four effort levels to sanity-check the day, and the seasonal multipliers that keep the plan honest.
In short
A quick way to budget hiking time is Naismith's Rule: every 5 km (3 mi) of distance plus every 300 m (1,000 ft) of elevation gain takes one hour. Check the day's totals against effort levels — casual, moderate, challenging, high — then add margin: multiply the budget by 1.5 in winter, and by 1.3 for rain or for altitudes above 9,800 ft (3,000 m).
A Time Budget: Naismith's Rule
Every 5 km (3 mi) of distance + every 300 m (1,000 ft) of ascent = 1 hour.
Effort Levels at a Glance
| Level | A typical day | Suited for |
|---|---|---|
| Casual | Under 1,000 ft (300 m) of ascent, under 6 mi (10 km) | Beginners |
| Moderate | 1,000–2,600 ft (300–800 m) up, 6–11 mi (10–18 km) | Hikers with a fitness base |
| Challenging | 2,600–4,000 ft (800–1,200 m) up, 9–16 mi (15–25 km) | Experienced hikers |
| High | Over 4,000 ft (1,200 m) up, over 12 mi (20 km) | Strong conditioning |
Safety Margins
- Short winter daylight: multiply the time budget by 1.5.
- Rain and slippery trails: multiply by 1.3.
- Altitude above 9,800 ft (3,000 m): multiply by 1.3.