I recently copleted a 2 week tour in Jordan. It was supposed to be 3 weeks but I cut it short because of the poor weather. Its a great place to explore with a bike; ancient Roman Ruins, Crusader Castles, the Desert, the Dead Sea, PETRA, Biblical sites and its extemely safe and friendly. But, March is definitely not the time to go and if you're not in good shape it can be very difficult at anytime. Extremely steep grades. I think the best time would be in September or October when most of us are in good shape after a summer of cycling and its not too hot in Jordan. I recently copleted a web-page for this short trip. Click on the link to see a few photos, my route map and other useful information.http://www.geocities.com/pathebikeguy/jordan2007.