The main trail is wide enough for a 100 with no trouble, so the 40 or the 4R will fit. Some of the side spurs are too tight for me though. Dan has some good GoPro video from our December run that gives you a good idea of trail width.
UZJ100 (Non-White Edition)
100's in the Hills
"What's that? I can't hear you over my heated seats"-KW