Started just before 3PM at American Lakes TH. Climbed up East Ridge of Static Peak first. Followed connecting ridge to Mount Richthofen. Idea was to descend to Lake Agnes. Wasn't sure if it was from the North Saddle or South Saddle of Richthofen. Ended up choosing the more southern one (way worse) and got myself into the worst terrain I have ever been on. Easily class 5 with rotten and loose rock. Highly suggest NEVER going down or up that way. It was dark by the time I got down to Lake Agnes. While I could have hiked the final 7 mi back, some folks that were camping were nice enough to offer me a ride back to the TH after hearing about my bad experience. Back at 9PM.