The elevation of Denver, Colorado is 5,280 feet (1 mile) above sea level. Denver is known as the "Mile High City" because of its official elevation. Visitors from lower elevations may experience altitude sickness due to the high altitude, which can cause headaches, nausea, and other symptoms. To adjust to the high altitude, it is recommended to drink plenty of water, avoid alcohol, and eat foods that replenish electrolytes. It is also suggested to give the body a day to acclimate to the higher elevation before engaging in activities such as skiing or hiking.