Mount Martin, Active stratovolcano in Katmai National Park, Alaska, United States.

Mount Martin is a stratovolcano on the Alaska Peninsula in Katmai National Park and Preserve. Its cone rises only about 500 metres above the surrounding ridge, and its 300-metre-wide summit crater is breached to the southeast. The crater is often ice-free because of geothermal heat and holds an intermittent acidic lake.

The volcano was named after George C. Martin, who explored the Valley of Ten Thousand Smokes in 1912 following the Novarupta eruption. This region sits within one of Alaska's most geologically active zones shaped by repeated volcanic events.

The volcano is named for George C. Martin, the first person to visit the Valley of Ten Thousand Smokes after the 1912 Novarupta eruption. His name ties the peak to that exploration, and the summit fumaroles leave sulfur deposits that visitors can see in the crater.

Access is only possible by plane or boat since there are no roads to this location. Visitors should bring weather-resistant gear and sturdy equipment because conditions can change quickly.

The summit crater is about 300 m wide and breached to the southeast, and its fumaroles leave extensive sulfur deposits. George C. Martin, the volcano's namesake, was the first person to visit the Valley of Ten Thousand Smokes after the 1912 Novarupta eruption.