Located between Mount Washington and Rattlesnake Mountain is a small, 900 foot elevation gain mountain called Cedar Butte. Take I-90 Exit 32 to Rattlesnake Lake and park at the Cedar Falls trailhead. A .8 mile walk along the Iron Horse / John Wayne Trail will take you to Boxley Creek; a couple hundred feet beyond that is a marked trail for Cedar Butte.
The trail is groomed, but overgrown to the point where it feels like you're bushwacking in spots. Eventually it opens up in a burned out forest to complete the short, 1.25 mile hike to the summit. From there, you're treated to a nice view of Mailbox Peak and the Middle Fork Snoqualmie River Valley. Someone has even gone through the trouble of providing benches and seats carved out of woodstumps. Also on the way up you can sneak peeks to Rattlesnake Lake and Ledge, which suprised us how far we had walked from the trailhead!