 Soon the North Fork Rapid River joins as well, followed by Meadow Creek.The North Fork rises four miles to the north, its headwaters flowing from Pear Lake, Peach Lake, and Grass Lake, close to Wenatchee Pass on the Cascade crest.Some of the larger mountains in the Rapid River's basin include Valhalla Mountain, Scrabble Mountain, Scorpion Mountain, Sunrise Mountain, Evergreen Mountain, Grizzly Peak, and Fortune Mountain.