Hike up to Romero Pools with Meaghan. It was wicked hot on the way up, and the pools felt great. We watched snakes eat little leopard toads (fascinating), then hiked back after some clouds had rolled in, and they even sprinkled a little on us on the way back.
My knee definitely hurt, but I brought my poles and it was overall okay. The next morning, knee feels way better than I thought (though my back is pretty sore).