Our meal products are tested between 3000' and 6000' feet in the wild places of Northwest Montana. For elevations greater than 6000', you may need to add slightly more water and increase cooking times to compensate for the lower boiling temperature. In general, a good rule of thumb is to add 3% more water and cook 30 sec longer for every 1000' elevation above 6000'. That means, for example, if you find yourself ready for a delicious hot meal to enjoy atop the summit of a Colorado 14er, you would add 25% more water and cook 4 minutes longer. Bring more fuel for these trips!