Hymasa is a brand-new (as of spring 2014) two-way singletrack trail that bypasses the main Amasa Back climb in the Amasa Back Area trail system. The beauty of this route is many-faceted: not only is this a bike-only route, which will allow you to get away from all of the traffic on the main 4x4 route, but this entire climb is completely rideable on a mountain bike! Yes, there are a few techy sections to keep you on your toes, but all of the grades and obstacles are moderate enough to make for a fantastic climb that, while gaining a lot of elevation, isn't boring. The views are classic breath-taking Moab, so be sure to bring your camera!
Recommended route: up Hymasa, down Captain Ahab.