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Most hikers need 0.5 L per hour in mild weather and up to 1 L per hour in heat; adjust by hours, terrain, and refills.

Plan roughly 0.5–1.0 liters of water per hiking hour, then adjust for heat, pace, altitude, and your sweat rate.

Most hikers need about 0.5 L per hour in mild weather, rising to 1 L per hour in heat; tune it for pace, terrain, altitude, and sweat rate.

Plan about 0.5 liter per hour in mild conditions and up to 1 liter per hour in heat while hiking.

Aim for about a thumb’s width of toe room in hiking boots so your toes can splay and never hit the front on descents.

Hiking-boot toe room should be 10–15 mm (about a thumb’s width) so toes move freely and don’t jam on descents.

Target pack weight: 10–15% of body weight for day hikes and 20–25% for multi-day trips, including food and water.

For hiking pack weight, aim for ~10% of body weight on day hikes and ~20% for backpacking, adjusting for terrain, season, and water.

Typical gratuity for a hiking guide is 10–20% of trip cost or $10–$25 per person per day, adjusted for service and location.

Day hikes: about 10% of body weight; overnights: near 20%, then tweak for terrain, fitness, and weather.