The Pacific Crest National Scenic Trail extends for 16.6 miles (26.7 km) through the Mount Washington Wilderness.

However, it does include some forested areas with stands of lodgepole pine, and there are 28 lakes in the northern and southwestern parts of the space.

There are small animals in the Mount Washington Wilderness like pikas, marmots, martens, snowshoe hares, and ground squirrels.

[12] The Pacific Crest Trail is the major path through the Mount Washington Wilderness, extending 16.6 miles (26.7 km) from the northern to southern edge of the area.

[13] Traversing lodgepole pine forest and lava flows, the trail passes over the western side of Mount Washington.

[14] Friendly for families and children, the Patjens Lake trail runs for 6 miles (9.7 km), only gaining 350 feet (110 m) in elevation.

[16] The area contains large amounts of cinder, more than 200,000,000 cubic yards (0.15 km3),[17][18] but there are alternate sources in the region, which are sufficient to meet local demands.

[7] While there is relatively little potential for geothermal energy in the High Cascades, there are hot springs along the western edge of the mountain range.

[20] The Belknap Hot Spring lies 4 miles (6.4 km) to the southwest of the wilderness area, ejecting water at a rate of 75 U.S. gallons (280 L) per minute with a temperature of 180 °F (82 °C).