"The Union Creek Trail hugs the wide creek throughout, with many lovely picnic spots. It doesn’t matter if you hike a few hundred feet, 1 mile, or all 4.4 miles, it’s all pretty and mostly uniform, except for the last mile, where the wide, airy canyon narrows to a moss-covered rock gorge, with much denser woods.
Look for quaking aspen (uncommon on the west side of the Cascades), bigleaf maple, red alder, Pacific dogwood, western white pine, white fir, western hemlock, mountain hemlock, ponderosa pine, sugar pine, lodgepole pine, Douglas-fir, Engelmann spruce, incense cedar and many other species in this transitional area between the montane and lower subalpine forest zones. Highlights: An easy, pleasant walk with an extremely accessible trailhead. Beautiful in autumn, with aspen, cottonwood, and bigleaf maple sending out glorious aromas."