Climb a peak or two, my BIL summited Little Jack (6,700' 12 miles and 5,100' gain/loss round trip, not bad for a 66 year old, he complained about stepping in fresh bear poop near the summit) and the boys (25-26 year olds) climbed to Sourdough Lookout (14 miles and 4,300' el gain/loss round trip)
Sourdough LO across the lake:
Jack (9,075') left side, and just to the right Little Jack at 6,700'.
Colonial Peak to the right.