K7ATN reported poor road/driving conditions when attempting to get to the Zig Zag Mountain trailhead on the south side of Zig Zag Mountain. This report shares activation information for the north approach from Riley Horse Campground. The drive can easily be done in a passenger car (recreation permit to park). There are two options from this point, I took Cast Creek trail, and it was 12.8 miles RT with 3900 ft vertical climbing total.
This summit had been activated in 2018. It has also been reported as summited in PeakBagger several times. When I went to attempt it, there were fire danger signs and "No Public Access" signs posted at the bottom gate. There appeared to be active logging operations and it was forecast to be extremely hot and dry weather, so these signs may be temporary. But as of now, no access. I will remove this post, if another activator posts that it is again opened up.
Indian Spring Butte is very near Strawberry Mountain (W7O/NE-018) and it is possible to summit both in a single day. It is 0.8 miles one way and 600 feet of gain. There is no defined trail, but the access is straightforward because of minimal undergrowth under the tree canopy and it is an easy ridgeline to follow.
This is a SOTA gem! A landowner blocked access to the original trailhead in 2011, but a new trail has now been established. The new trail has some challenges but is easy to follow, with signs of regular maintenance. The summit offers a wonderful 360-degree panorama view with Mt St Helens looming large just North of the summit.
I activated Monte Carlo in May 2021 and wanted to provide updated information about the summit.
It appeared to me that access to Grayback Mountain was possible to summit from the South staying off of Yakima Nation Lands. I also found a trail map with access and photos of the summit from 2019 here: http://www.willhiteweb.com/washington_fire_lookouts/grayback_mountain_lookout/map_300.htm
Hauk Butte is a 9.5-mile RT hike with ~2000 ft gain located Northeast of Dog Mountain and Augspurger Mountain north of the Columbia River. Reaching the summit is possible entirely on logging roads, which go right up to the exact SOTA summit. At the summit, you are surrounded by trees on each side of the road as the summit has not yet been logged. This came in handy when I activated during 20-30 mph winds: the trees made a good wind break.
Shingle Mountain summit is a 5-mile out and back hike located Northeast of Dog Mountain and Augspurger Mountain north of the Columbia River accessed from a national forest road just before reaching the Moss Creek Campground. I marked both “Easy Trail” and “Treacherous Trial” above because like many SOTA summits, you get both on this one.
K7EEX trip report for Wolfe Point (http://www.pnwsota.org/blog/k7eex/2018-january-13/wolf-point-oregon) mentioned a possible south trail. This report confirms a south access to Wolfe Point.
If coming from Cedar Butte activation, turn off of the road at: N45.57747° W123.63990°. Park at N45.57731° W123.61891° the trail looks like a small drainage (see pic). It is not maintained and hard to follow in places but you can get to the top from this south access.
Underwood Mountain is a 2 pt summit Northwest of Underwood, WA across the river Northwest from Hood River Oregon. The start point is about 4.5 miles off of highway 14. It is an easy 3 mile hike to the summit with 1400 ft elevation gain on forest roads closed to motor vehicles. There is a short 250 foot doable bushwack to the summit. It would be a very feasible mountain bike activation.