2024 Map of Casto

About this map

Casto serves as a small anchor in this deep wilderness survey of Custer County, situated along the winding path of Loon Creek. The landscape is dominated by the Challis National Forest and the Frank Church-River of No Return Wilderness, where transportation relies heavily on a complex network of trails and unpaved routes. Notable among these is the Loon Creek Road (Winter Trail) Trl and the Knapp-Loon Creek Trl, reflecting the area's history of seasonal access and pack travel. Remote aviation infrastructure is represented by the Upper Loon Creek USFS Airport, providing a vital connection to the outside world. To the east, the drainage system of Mayfield Creek and its forks, including East Fork Mayfield Creek, carves through the terrain, with historical routes like the East Mayfield-Yankee Fork Trl tracing the high ridges and valley floors.