Visitors planning to explore lava tube caves need to come prepared with warm clothing, protective headgear, at least three sources of light, sturdy footwear, and leather gloves. Do not take these warnings lightly; if you lose your light source even a short distance from a cave entrance it is extremely likely that you will become disoriented in the darkness and unable to find your way out. Similarly, the cave floor is rocky, uneven and often slippery, making sturdy footwear is an absolute necessity to avoid foot and ankle injuries.
Sturdy hiking boots are required when hiking on lava terrain and daypacks with water, snacks, raingear, first aid kit and sunscreen are suggested. The heat while on lava flows can be intense, so plan on drinking at least one gallon of water per person per day. In addition, be aware that progress over lava flows is slow, that lava is sharp and can easily tear apart tennis shoes, and that some sections of lava are unstable and may simply be thin crusts covering sinkholes.
Less common park dangers include rattlesnakes, scorpions and spiders, which can be easily avoided by being cautious in rocky areas; these creatures crawl under rocks to avoid the sun, so be cautious when reaching into crevices or overturning rocks. In addition, the area around McCarty's crater was once used as a military bombing range, and while unlikely, it is possible that unexploded ordinances may be encountered if traveling in this remote location. It goes without saying that any munitions that are encountered should not be handled and should be reported to rangers.
fees/permits
There are no entrance fees charged for visiting the park.