Why would you want to do this? It's asking to screw up your knees, your back or twist an ankle
If you want to train for climbs, just hike and aim for elevation gain. Mt Si, Teneriffe, Mailbox, Granite, McClelan Butte, Pilchuck, Muir... are all good choices for that. In fact, any of the ski areas for that matter. Pack extra water if you want weight. You can dump out the water to go lighter on your descent, but I really think the whole lug a hundred pounds idea is a bad one.