I just finished a week with Acadia Mountain Guides chief, Jon Tierney. We went to Joshua Tree in CA and Red Rocks in NV. His knowledge of the areas is amazing, and he tailored climbs for a friend and me - so we had challenge but were not overpowered. Cracks galore, slabs, and faces with cracks. Weather great. I like the fact he teaches you how it should be done safely and efficiently while you are having a ball doing the climb.