if you only need to carry two people when you go mountain biking, then consider the prius. The seats fold down like IMAhybrid stated, so you can fit a lot of stuff. People from priuschat.com have put a lot of stuff in there, with some claiming to have been able to put in a 52" DLP tv and a washer (not at the same time) in their prius, with several putting in their mountain bikes.