ik: just went thru a very similar thing most of october/november after 30 miles in one day (had been working up to that in 3-5 mile increments) around the same time i changed saddles and was toying with seatpost height and had switched to longer cranks as well... extreme pain, lots of tenderness all around my right hip and down the quadraceps at the front... was getting better, took a few short rides, pain came back... sat like a lump for several weeks staying off the bike and only now is the pain steadily disappearing... apparently ischial tuberosity and/or iliotibial band injury are VERY common amongst bike riders...