If you are planning to visit the summit, it is highly recommended that you stop at the Visitor Information Station (VIS) at 9,200 ft to receive a current weather update, safety information, and to adjust to the change in altitude. Mauna Kea is unique because it is one of the only places in the world where you can drive from sea level to 14,000 feet in about 2 hours, so altitute sickness is a high possibiliy. At 14,000 feet, there is 40% less oxygen than at sea level, so visitors should acclimatize to the altitude before proceeding further up the mountian. Anyone in poor health should consult their physician before planning a visit to Mauna Kea. We do not recommend anyone who is pregnant to go further than the VIS. People under the age of 16 should not go any further because their bodies are still developing and they are affected more rapidly when going to a high altitude. If you plan to scuba dive, do not plan to go up to the summit within 24 hours of your dive. Furthermore, we do not recommend anyone with a heart or respiratory problem to travel above the VIS.
We also highly recommend that only 4 wheel drive vehicles travel beyond the VIS. About 300 yards beyond the station, the pavement ends and the next 4 and a half miles are a steep graded-gravel road. It is recommended that you check with your car company to see if you are allowed to travel on Mauna Kea.
If you are visiting the summit area, please leave the landscape as you find it. Do not disturb the terrain or build rock piles. Please stay on designated roadways and trails. Off-road driving is prohibited. Mauna Kea is a sensitive enviornment, so please treat it as such. Do not litter.
