3537 is a 4-pointer right off Marble Mountain Sno-Park, and despite the busy climbing season it is easily possible to get in here and activate it. You might combine this with a summit of nearby LC-075, if you are feeling especially ambitious.
To get here, take I-5 to Woodland, then SR 503 which becomes SR-503 Spur, which turns into NF-90; turn left onto NF-83 and drive 6 miles to Marble Mountain Sno-Park.
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
NOTE: Conditions on Mt. Hood can change weekly, even daily. Consult up-to-date weather, avalanche, and beta reports.
On March 31st, 2021 I took advantage of a weather window and reasonable avalanche forecast to activate Mt. Hood (W7O/CN-001) via the standard South Side route.
Drive-Up on a spur road from the Magruder Corridor
16.2 miles, +4,300 ft; -4,200 From Elk Mountain TH
1.2 miles, +300, - 200 ft ft from Trail 562 Junction
I activated this on the 14th day of a 15-day backpacking from the Elk Mountain Trailhead, via Mink Ridge & Marten Creek with a side-trip up Marten Creek to Marten Hot springs; but the route description is the more direct route across Goat Creek and along the Square Rock & Moose Ridge.
18.5-miles, +4,700 ft; -5,300 From Elk Mountain TH
3.5 miles, +800, - 1,500 ft ft from Trail 562 Junction
I activated this on the 13th day of a 15-day backpacking from the Elk Mountain Trailhead, via Mink Ridge & Marten Creek with a side-trip up Marten Creek to Marten Hot springs; but the route description is the more direct route across Goat Creek and along the Square Rock & Moose Ridge.
This was the second activation of LC-001 for both WE7CAT and KL0NP. The first year WE7CAT had just gotten her tech license and was too shy to talk on the radio. The next year she activated it without me with using an Anytone 878 with stock rubber duck antenna and was able to do a S2S with me while I was on Mt. Townsend in the Olympics. This year WE7CAT/AE had just passed her Extra Class exam, and was ready to make contacts.
10.7-miles, +3,800 ft; -2,900 From Elk Mountain TH
1.2 miles, +1,000 ft from Trail 562 Junction
I activated this on the 12th day of a 15-day backpacking from the Elk Mountain Trailhead, via Mink Ridge & Marten Creek with a side-trip up Marten Creek to Marten Hot springs; but the route description is the more direct route across Goat Creek and along the Square Rock ridge that we took on our way out.
24.2 miles, +7,500 ft; - 6,800 From Elk Mountain TH
5.2 miles, +3,800; -500 ft from Buck Lake Creek
22-miles, +6,200 ft; - 6,500 From Elk Mountain TH
3.0 miles, +2,400 ft from Buck Lake Creek