Boulder Ridge is a elevation mountain ridge located in the eastern Olympic Mountains in Jefferson County of Washington state. It is set within Buckhorn Wilderness on land managed by the Olympic National Forest. Its nearest higher peak is Alphabet Ridge, to the south, and Buckhorn Mountain rises to the north. Precipitation runoff from Boulder Ridge drains east into headwaters of the Big Quilcene River, west into tributaries of Dungeness River, and south into Charlia Lakes, thence Tunnel Creek.