 The range's northern boundary is formed by the upper Jennings River, a tributary of the Teslin River system which is part of the Yukon River drainage.Thus, the triple divide between the Mackenzie, Stikine, and Yukon River basins lies within the range.The Continental Divide transits the eastern side of the range, though does not touch on its highest summit, Ash Mountain, which is at the north end of the range and is within the basin of the Jennings.