The Tahoe Rim Trail (TRT) is a 171-mile long loop trail around Lake Tahoe. The "grand opening" celebration for the TRT was in September 2001. The TRT has seen many speed record attempts -- a testament to the quality of the trail as well as its location near to the hub of ultrarunning in North America. An interesting feature of the trail is that, since it is a loop, one can choose basically any starting/finishing point, and can run in either direction (clockwise or counter-clockwise).