My husband and I are planning an active (cycling, hiking, cycling) vacation in the mountains of New Mexico next month and I am concerned about altitude sickness since we will be riding at 6,000-9,000 ft.

A couple weeks ago we went to Fort Davis, TX, which is 5,000 feet and I experienced mild altitude sickness. I had the lack of appetite due to nausea, the fatigue, swelling hands and headaches. The riding out there was horrible due to my lack of energy and I am concerned now for New Mexico. Any tips for dealing with or preventing altitude sickness? I drank water like a camel in Ft. Davis and still was dehydrated much of the trip.