Hamilton Mountain is one of the more popular hikes in the Columbia Gorge. Located @ Beacon Rock State Park, the climb up the South side offers some spectacular views up and down the Columbia River and some of the peaks in the Gorge and the Cascades. The trail was a CCC project from the FDR Administration, as are the restrooms and the picnic shelter.
The trailhead parking lot is located by the restrooms in the lower picnic/day use area. On the week-ends the parking lot fills fast, but there is additional parking in the upper picnic area, unless it is being reserved for a group activity.
The trail begins in second growth forest, with remnants of the original old growth still visible. Passing under the power line the trail continues uphill another mile to Rodney Falls, with side spurs to Hardy Falls Viewpoint and Pool of the Winds. Cross the bridge and negotiate some steps up out of the creek drainage, and continue uphill to a junction with the Hardy Creek Trail, passing the first good view looking back on Beacon Rock. The South Side Trail is to the right (more difficult) and continues somewhat strenuously toward the false summit. There is another viewpoint down through a slot in the Basalt cliffs before you reach the false summit. Once you are on the North side of the false summit, find a couple of wildcat trails to the top of the false summit which offer some great views. Caution is required here.
A series of switch backs takes you above the false summit to an open slope before the trail enters the woods again and the last leg of 14 switchbacks to the summit. Views east from here include Table Mountain, Mt. Adams, Wind Mountain, Dog Mountain, and Mt. Defiance, with the top of Mt Hood visible to the South.
The easiest return is to hike the trail along the North Ridge to the saddle. Go left at the old road and follow that downhill to Don's Cutoff Trail. This is my preferred route to the Hardy Creek Trail, although following the old road down is an option. Just before the old road crosses Hardy Creek the trail takes off to the left across a wooden footbridge. Although this trail parallels Hardy Creek back to the junction with the Hamilton Mountain Trail, the creek is not visible again till you crss the bridge at Rodney Falls. From this point the trail backtracks to the parking lot.
A good pair of hiking boots are essential to maintain good footing. Sunscreen and bug repellant is also recommended. Be sure and take plenty of water especially if the day is warm and sunny as there are no potable water sources along this route.
WARNING: THERE IS ALOT OF POISON OAK ALONG SECTIONS OF THIS LOOP HIKE. TAKE THE NECESSARY PRE-CAUTIONS.