Do I need a torch for the lava tubes?

Yes, and it is not optional. A phone light will get you a few metres and then frustrate you; a proper torch or head torch turns this from peering into darkness into an actual exploration. A head torch is better because you want your hands free for the scramble. Take a spare, or make sure someone else in the group carries a second light.

How did the lava tubes form?

Lava flowing across this area cooled and hardened on the outside while the molten interior kept moving, and when the flow drained away the crust remained behind as a hollow tube. The practical consequence is the surface you walk on to reach them — rough, sharp, blistered black basalt, quite unlike the smooth sandstone elsewhere in the park, and hard on both shoes and hands.

Is it safe to go inside?

With care and sense, yes, but it is a scramble down through an opening onto uneven footing rather than a staircase, and it needs attention with children or anyone unsteady. Wear proper shoes, consider gloves for the sharp rock, move deliberately on unlit ground, watch your head, and do not go alone. In a desert, cool dark places shelter wildlife — look before putting a hand down.

Snow Canyon's Lava Tubes

Snow Canyon's lava tubes: hollow caves you climb down into, on a trail across black volcanic rock. Bring a torch.

The lava tubes in Snow Canyon State Park are the park's most unexpected feature: hollow caves you can climb down inside, formed by molten rock, in the middle of a red-rock landscape.

How they formed, and why that matters underfoot

Lava flowing across this area cooled and hardened on the outside while the molten interior kept moving. When the flow drained away, it left the crust behind as a tube.

The practical consequence is the surface you walk on: rough, sharp, blistered black basalt, quite unlike the smooth sandstone elsewhere in the park. It is hard on shoes and unforgiving on hands and knees.

Getting there and getting in

The tubes are reached along the Lava Flow Trail, which crosses the black rock from the road.

Entering is a scramble — down through an opening in the rock, using hands, onto uneven footing. It is not technical, but it is not a staircase either, and it needs care with children and with anyone unsteady.

Inside, some chambers are tall enough to stand in, and it is genuinely dark.

Bring a torch. This is not optional.

A phone light will get you a few metres and then frustrate you. A proper torch or head torch turns this from a peer-into-the-dark into an actual exploration, and a head torch is better because you want your hands.

Take a spare, or make sure someone in the group has a second light.

Safety, honestly

Sharp rock everywhere. Gloves are genuinely useful for the scramble in and out.
Uneven, unlit footing inside. Move deliberately.
Do not go alone, and tell someone where you are.
Watch your head. Ceilings vary and the rock is abrasive.
Wildlife shelters in cool dark places in a desert. Look before you put a hand down.

Practical

Sturdy shoes with real soles. This is the single most important piece of kit after the torch — trainers are shredded by basalt.
No shade at all on the approach. From June into September, go early. Utah has the highest melanoma rate in the country, and shade on most of this is scarce — sun protection is equipment here, not caution.
The black rock absorbs heat and is markedly hotter than the surrounding sandstone in summer.

Pairing it

The tubes make a natural set with the Petrified Dunes — two completely different geologies within a short distance — and Jenny's Canyon. Together they are the best half-day in the park; see the Snow Canyon guide.