Mauna Kea Science Reserve Adventures
Mauna Kea Science Reserve is a premier location for astronomical research, set atop Hawaii's highest peak with unique geographical and ecological features.
Popular Activities
Plan Your Visit
Everything you need to know to prepare for an unforgettable trip to Mauna Kea Science Reserve.
Entrance Requirements
Free access; however, some areas and facilities may require fees.
Best Time to Visit
The best time to visit is during the dry season from April to October for clearer skies and safer road conditions.
Visitor Information
Onizuka Center for International Astronomy Visitor Information Station
Getting There
Access is via Saddle Road (HI-200), and then Mauna Kea Access Road; 4WD recommended beyond the visitor station.
Weather & Climate
Summit temperatures average between 25-40°F year-round with potential for snow; lower visitor station temperatures range from 40-65°F. Conditions can change rapidly.
Conservation Efforts
Environmental concerns include impacts from human activity such as increased visitor traffic, potential pollution from facilities, and threats to habitat of rare species.
Camping in Mauna Kea Science Reserve
Find the perfect spot to stay overnight and immerse yourself in the details.
Top Trails
Mauna Kea Summit Trail
A challenging hike that takes you directly to the summit for unparalleled views and observatory access.
Pu'u Huluhulu Trail
Easier hike offering panoramic views from the top of an ancient cinder cone.
Trailblazer Tips
Prepare for altitude sickness due to high elevation; acclimatize if necessary.
Weather can be unpredictable with snow possible at the summit—even in summer.
Visiting at night requires warm clothing and vehicle headlights to be minimized for stargazing.
Four-wheel drive is recommended for the ascent beyond the visitor center—check vehicle restrictions.