2020 Map of Trinity Mountain

About this map

Trinity Mtn and the high ridges of the Trinity Mountains dominate this high-elevation landscape within the Boise National Forest. The map reveals a dense concentration of glacial lakes tucked into alpine cirques, including Big Trinity Lake, Big Roaring River Lake, and the connected waters of Middle Rainbow Lake and Big Rainbow Lake within the Rainbow Basin. These water bodies serve as the headwaters for numerous drainages like Trinity Cr and Smith Creek, which carve through the steep terrain defined by Lava Mountain and Trinity Ridge.