thursday - drive to Scott Mountain Campground 360 miles. PCT crosses highway 3 there. The one thing I've noticed thru hikers really like is fruit like a banana or orange. Or soda. Or beer. Free, primitive campground. Lots of nearby spots to camp if campground is full.
friday - Get permit from Coffee Creek Ranger Station. Trinity Center - last store and cell phone. Swift Creek Trailhead. Granite Lake, 2000 feet elevation gain, 5 miles
above Granite Lake:
Saturday - Granite Lake Pass, down to Deer Creek, over Deer Creek Pass, camped a mile further in Siligo Basin, 3000 feet elevation gain, 7 miles
Sunday - back, Siligo Loop, Deer Creek Camp, 700 feet elevation gain, 7 miles
From Deer Creek pass, Deer Lake, beginning of the Siligo Loop trail
Monday - up to Black Basin, Seven up Trail, Granite Lake, 2000 feet elevation gain, 6 miles
Tuesday - back to Scott Mountain, 5 miles
Wednesday - back home
You can see I didn't get a lot of distance in, but I did get some elevation gain. I thought it was hot, like 80 F. People east of Cascades might call me a wienie. August should be hot.
as you can see from those couple pictures, there is a lot of granite to walk through, favorite of mine
I don't know of any climbing. I know there's some at Castle Crag. With all the granite at Trinity Alps there must be climbing somewhere
Another trip would be up Coffee Creek road, Caribou Lake,... - about the same distance from Portland
Another place to camp would be Mt Ashland campground, a few miles west of I-5