Mount KatmaiAbout Mount Katmai
Mount Katmai is a stratovolcano on the Alaska Peninsula in southwestern Alaska, U.S., with an elevation of about 2,047 meters (6,716 feet). It lies within Katmai National Park and Preserve and is associated with the major 1912 Novarupta volcanic event.
The site includes a collapsed summit caldera and nearby steam-vented areas known as the Valley of Ten Thousand Smokes. Visitors travel into the park for geological features, crater views, and wildlife in the surrounding park - access is by air or water and facilities are seasonal.
The caldera was formed during the 1912 eruption when the summit collapsed as the nearby Novarupta vent erupted explosively. The 1912 event is one of the largest eruptions of the 20th century and reshaped the local landscape.
Mount Katmai sits on the Alaska Peninsula within Katmai National Park and Preserve, roughly 480 kilometers (300 miles) southwest of Anchorage by air and accessible from the small regional hub of King Salmon. The surrounding landscape is volcanic, with rivers, tundra and coastal inlets.
- Access: Access to the Katmai area is primarily by small aircraft or boat from King Salmon; services are seasonal and weather-dependent.
- Best season: Best time for visitation is summer months when floatplane services operate and park facilities are open.
What to See#
- Katmai caldera: A steep-walled caldera formed by the 1912 Novarupta eruption, featuring fumaroles and a crater lake within the summit depression.
- Valley of Ten Thousand Smokes: An ash-filled valley created during the 1912 eruption with dozens of fumaroles and steam vents; access typically requires boat or floatplane into Katmai National Park.
Best Time to Visit Mount Katmai
Go in mid‑summer (July-September) for the best access, services and brown-bear viewing.
Weather & Climate near Mount Katmai
Mount Katmai's climate is classified as Tundra - Tundra climate with cold summers (peaking in August) and freezing winters (coldest in March). Temperatures range from -11°C to 6°C. Abundant rainfall (1054 mm/year), wettest in September.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | - | -9° - -3° | -13° | 78 mm | - | - | 6.3 m/s | - | - |
| February | - | -9° - -4° | -14° | 69 mm | - | - | 6.4 m/s | - | - |
| March | - | -11° - -8° | -17° | 74 mm | - | - | 5.1 m/s | - | - |
| April | - | -9° - -6° | -15° | 63 mm | - | - | 5.1 m/s | - | - |
| May | - | -5° - -1° | -8° | 65 mm | - | - | 4.4 m/s | - | - |
| June | - | -2° - 4° | -4° | 88 mm | - | - | 4.5 m/s | - | - |
| July | - | 1° - 6° | 0° | 94 mm | - | - | 4.4 m/s | - | - |
| August | - | 2° - 6° | 0° | 119 mm | - | - | 4.8 m/s | - | - |
| September | - | 0° - 3° | -4° | 131 mm | - | - | 5.5 m/s | - | - |
| October | - | -6° - -1° | -10° | 104 mm | - | - | 5.4 m/s | - | - |
| November | - | -7° - -2° | -11° | 85 mm | - | - | 5.9 m/s | - | - |
| December | - | -8° - -2° | -12° | 84 mm | - | - | 6.7 m/s | - | - |
How to Get to Mount Katmai
Mount Katmai is in Katmai National Park on the Alaska Peninsula; the usual gateway is King Salmon (the nearest town with a scheduled airstrip). From King Salmon you must take a park-approved bush/floatplane or a boat charter to Brooks Camp or other coastal access points in the national park - there are no roads connecting Katmai to the Alaska road system. Once at Brooks Camp or another landing point you proceed on foot or by guided boat/hike into the backcountry; travel inside the park is often by trail and tundra travel and requires planning with park services or a licensed guide.
Tips for Visiting Mount Katmai
- Access to Mount Katmai and the park is almost entirely by air or boat from King Salmon-plan and book a bush plane or charter well in advance (seasonal service, mainly summer) rather than expecting road access.
- If you want to avoid the biggest crowds at Brooks Camp (the park's main visitor hub for bears and views), visit right at opening or late afternoon; for more solitude, arrange transport further into the park to Novarupta/Valley of Ten Thousand Smokes, which sees far fewer visitors.
- Check the National Park Service Katmai pages and current bear-viewing and safety advisories before you go; ranger programs and viewing boardwalks are the safest way to see wildlife and conditions (volcanic/river/bear activity) can change quickly.