Gary has a wealth of knowledge ledge about the Palm Springs area. He understands a lot of the geology involved in the rock, formations, sediment, earthquake faults, and has an excellent grasp of the general history of the area. We had a wonderful time with him as our guide. The adventure was fun, entertaining, and enlightening. We highly recommend the tour for people wanting to become more familiar with the geology of the area. Be prepared to be bounced around a lot in the hunter. That was fun too.