how long should one acclimate to altitude
If you live at sea level and have a race at high altitude, you should train at high altitude for at least two weeks, though preferably three to six weeks, before your competition. Dehydration and acute altitude sickness symptoms are more likely to occur within the first one to two weeks of altitude exposure, and will likely worsen race performance. However, since these symptoms often take 24 to 48 hours to develop, you may also wish to race within 24 hours of your arrival at altitude. Although you will not acclimate to the altitude during this short time frame, you likely will avoid the physical symptoms of altitude exposure.