2014 Map of Porphyry Reef

About this map

Porphyry Reef and Washboard Reef anchor this high-altitude landscape where the Flathead National Forest meets the Lewis and Clark National Forest. This 2014 survey documents the complex hydrological divides of the Continental Divide region, where headwaters like the N Fork Sun River and W Fork N Fork Teton River emerge from distinctive alpine basins. Notable terrain features including Bowl Mtn and Corrugate Ridge define the vertical character of the area, while mountain crossings at Teton Pass and Sun River Pass trace the established routes through this wilderness. The map provides a detailed view of the natural meadows or "parks" that break the forested slopes, specifically Grizzly Park, McDonald Park, and Round Park, which have long served as landmarks for travelers and surveyors navigating the Teton and Flathead county lines.