I would say toughest all day venture was:
West ridge of Mt. Triumph, car to car in 20 hours. It about a 20 miles round trip we has originally planned on doing in 2 days. When we got to the trailhead it was my bright idea to go car to car. Left the car at 3:30 am. After 10 miles of up and down and some snow to cross, we got to the base. The book calls it 15 pitches (I think), we simuled it in 5 pitches 100 feet apart. 10 rappels and 500 feet of down climbing brings us back to the packs. Then the 10 miles hike out. By the time we gained the last stretch up the notch, my right knee had given out. Had to limp with a stick 5.3 miles back to the car. Earlyer my head lamp batteries had fallen out of my pack (boo hoo), point being we had one headlamp between both of us. I ended up taking it, in the lead while limping with a stick I found. Hobbled into the parking lot before midnight sometime and could barley bend my knees to laydown.
I was way off the couch for the alpine setting. I was wrecked for the next couple of days. Super fun and easy climbing. Unless you are super fit. I would not recommend doing this car to car.