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Health & Safety Requirements

Mount Washington is one of the most extreme and remarkable places on the planet, but not everyone is suited for this environment.

The New Hampshire Fire Marshall's Office requires that all summit visitors and volunteers meet one basic requirement: In the event of an emergency, you must be physically able to "self-evacuate" from the summit. This means you must have the physical ability to get yourself down the mountain, even in extreme conditions. We urge all participants to take this requirement very seriously.

The Mt. Washington Auto Road, which we use to access the summit, is about eight miles long. Approximately half of the road is above tree line. Weather above tree line is often severe, and can turn deadly if you are unprepared, ill-equipped, or unable to hike to safety in the event of a vehicular breakdown.

Note: Trips will not be made far above tree line if the weather is judged to be extraordinarily severe, but even normal weather on Mount Washington can prove lethal to those who are unfit or poorly prepared.

Winter Weather

Our winter operating season is defined as the time when ice and snow engulf the summit, and the Mt. Washington Auto Road is closed to private vehicles. Generally, this is mid-October through mid-May.

An average mid-winter day on Mount Washington finds the summit in rime-ice producing fog, with visibility limited to 100 feet or less, a temperature of about 5°F, and a wind speed near 50 mph. Gusts of 70 mph or greater are likely. A typical wind chill would approach -25°F. It is not uncommon to experience temperatures as low as -45°F, with winds gusting over 100 mph.

Hiking conditions may include drifted snow, glaze ice, sub-zero temperatures, hurricane force winds, and near zero visibility.

Summer Weather

Our summer operating season is defined as the time when the Mt. Washington Auto Road is open to private vehicles. Generally, this is mid-May through mid-October.

An average mid-summer day on Mount Washington has a high temperature of about 53°F and an overnight low of about 42°F, but freezing temperatures can occur during any month of the year. Winds average about 25 mph, with hurricane-force gusts possible. Thick, wet fog occurs on about 90% of the days in summer, and measurable precipitation is recorded about every other day.

Hiking conditions may include frigid temperatures, high winds, blowing precipitation, and limited visibility.

Due to the severity of these conditions, we require that all participants:

  • Are in excellent physical condition
  • Are at least 14 years old for a summer overnight trip, or 16 years old for a winter day trip or overnight trip (minors must be accompanied by a parent, legal guardian, or qualified adult leader)
  • Are ready, willing, and able to hike to safety (which is sometimes several miles away) in severe conditions
  • Are properly prepared with all the required clothing and equipment
  • Submit a health form attesting to their physical condition
  • Sign a release form absolving the Observatory of responsibility in the instance of illness, injury, or death
Required Forms

Health & Emergency Form
Purpose: To document your emergency contact information and health information, including medical conditions and allergies, to be used in the event of an emergency.
Due: Immediately after registering for any visit to the summit.
Fill Out Health & Emergency Form

General Release and Assumption of Risk
Purpose: To make you aware of your personal liability, and absolve the Observatory of responsibility in the instance of illness, injury, or death.
Due: Immediately after registering for any visit to the summit.

Clothing & Equipment

A list of required winter gear can be found here.

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