Exposed Summit

The summit is a developed overlook with a large parking lot for turning around. Great views in all directions, from Pomerelle to Sun Valley, and beyond. There are no trees on the summit, but many wood fenced informational viewpoints which made it easy to Velcro my antenna masts to.

Access is from paved Rock Creek Road (FS-515). After turning off of Rock Creek Road, the summit access is a 1.4-mile dirt/gravel road (FS-507). There is 642 feet of elevation gain. The road is improved and passable for most vehicles when dry.  Google Maps provides good directions to the summit.

Peak 4260 is 1.8 miles RT hike and about 600 feet gain.

Depending on how far you choose to drive, Gray Butte will be a 1.4 mile road hike (OW) with about 1200 feet gain. There's another summit that could add another two points with 1.8 miles of hiking. Although I was thinking that the road might require high clearance, a Prius drove up after me - so know your vehicle.

Pine Ridge is a steep hike of a little less than one mile (OW) and 800' vertical, close to Gray Butte-W7O/CE-180 and Grizzly Mountain-W7O/CE-135 so you might consider doing other peaks in the area. Do not confuse this "Pine Ridge" with the W7O/CE-157 "Pine Ridge" about 50 miles to the south.

Lookout Mountain is a lovely hike of about 1.75 miles (OW), close to Round Mountain-W7O/CE-045 so you might consider doing both of those peaks. Note that there are MANY Lookout Mountains - this one is east of Prineville.

Round Mountain is a road hike of about 2 miles one-way and 1000 feet of gain. It's close to Lookout Mountain-W7O/CE-039 so you might consider doing both of those peaks.Note that there are FIVE Round Mountains in Oregon, with one in CE near Lakeview. This is the Round Mountain east of Prineville.

My son and I did this activation. The starting point for our hike was the intersection of FR 5603 and the Pacific Crest Trail. We parked at this location and started walking down the PCT  which was adjacent. We found no trail to the summit so we started bush whacking. It was not too hard. After about an hour, we made the summit. 

Quick notes: I have Google Fi, which uses T-Mobile and Sprint. Cell service is great, if you have a view to the northeast. Otherwise, it dies, and quickly. This was obvious when I was trying to stay in contact with people throughout the hike, leading to cutting in and out throughout the trip. I got it into my head to try a 4-pointer with no activations, and I saw a prime candidate, of only .7 miles with a gain of only a few hundred feet! What a find! Only problem is, there's no trail. Well, that's no problem!

After reading K7EEX's warning about Stimson land, I reviewed the maps and Peakbagger reports, and found that a 2.6-mile trail existed starting right from the edge of US 26, up Shields Road, and staying on Tillamook State Forest land for the majority of the trip. In fact, this summit can be activated without ever stepping foot on Stimson land, as the boundary of their land is just a little higher than the activation region, but Stimson has a permissive access policy for non-motorized, leave-no-trace day use, so read their stipulations and head right up.

Summary: West Onion Peak is a great activation if you don't mind the 13 mile round trip hike. Also the final bit of the hike requires a bushwhack/boulder scramble but the activation zone is a cleared bolder area which is also the location of an old fire lookout with nothing but some tower bases and the cement pad left.