Homestead Crater with Kids: Swimming in a Volcanic Hot Spring in Midway
Swimming inside a 10,000-year-old volcanic hot spring dome is as incredible as it sounds. Here is everything families need to know about visiting the Homestead Crater in Midway.
What Makes the Homestead Crater So Special
Imagine swimming inside a massive beehive-shaped rock dome that was formed by volcanic hot spring activity over 10,000 years ago. The water is a constant 90 to 96 degrees, crystal clear, and mineral-rich. Sunlight filters through a hole in the top of the dome, creating shafts of light that hit the water like something out of a fantasy movie. This is the Homestead Crater in Midway, and it is genuinely one of the most unique natural attractions in the entire United States, let alone Utah. And yes, your kids can swim in it.
The Crater is located on the grounds of the Homestead Resort in Midway, about 20 minutes from Park City through the beautiful Heber Valley. It has been a beloved local attraction for generations, though many visitors to the area have never heard of it. The dome is about 55 feet tall and the water inside is up to 65 feet deep in some areas, though there is a floating dock in the center and the swimming area is well-managed for safety. The entire experience feels otherworldly, like you stumbled upon a hidden grotto that should not exist in the middle of a Utah mountain valley.
For families, the Crater offers swimming sessions that are accessible and magical in equal measure. My kids were absolutely wide-eyed the first time we walked through the tunnel entrance into the dome. The acoustics inside are incredible with every sound echoing off the rock walls, the warm humid air envelops you instantly, and the blue-green water glowing in the dim light is mesmerizing. It is one of those places where even teenagers put down their phones and just take in the surroundings with genuine wonder.
Swimming Sessions: What to Expect
The Crater operates on a reservation system with timed swimming sessions, typically lasting about 40 to 50 minutes in the water. You will want to book ahead, especially during peak tourist seasons and weekends, because sessions do sell out. The experience begins with a short walk through a tunnel that was bored through the rock to provide access to the interior. This tunnel walk is part of the fun, building anticipation as the air gets warmer and more humid the deeper you go, until you emerge into the dome and see the pool stretching out before you.
The swimming area has a large floating platform in the center that kids love climbing onto and jumping off of, though jumping rules vary so check with the staff. The water is warm enough that you can swim comfortably without getting chilled, which is a huge plus for kids who tend to turn blue after five minutes in a regular pool. The mineral content of the water gives it a silky feel that is different from chlorinated pool water, and many people believe the minerals have therapeutic properties for skin and muscles.
Life jackets are available and recommended for younger or less confident swimmers. The depth varies significantly in the Crater, with shallow areas near the edges and much deeper water toward the center, so non-swimmers and young children should always have flotation assistance. I recommend bringing a swim vest for kids that they are already comfortable wearing, since being in an unfamiliar environment is not the time to introduce new safety gear that might feel strange or scary. Having their own familiar vest helps kids feel confident and lets them enjoy the experience fully from the first moment.
Snorkeling and Scuba: Adventures for Older Kids
Beyond basic swimming, the Crater offers snorkeling and even scuba diving experiences that are incredible for older kids and teens. Snorkeling in the Crater lets you peer down into the deep blue-green water and see the rock formations below the surface, which look like an underwater alien landscape. The clarity of the water is remarkable and you can see a surprising distance down into the depths. It adds a whole other dimension to the experience and kids who are comfortable with a mask and snorkel will be completely enthralled.
Scuba diving sessions are available for certified divers and include introductory discover scuba experiences for beginners, including teens who meet the age requirements. Diving in the Crater is a unique freshwater geothermal dive that is unlike anything else, and for families with older kids who are interested in scuba, it is an unforgettable introduction to the sport in a controlled, warm, and incredibly scenic environment. Check current age requirements and book well in advance, as dive sessions are limited.
For the snorkeling sessions, basic equipment is usually available to rent on-site, but having your own gear that fits well makes the experience much more enjoyable. A kids rash guard is great for the Crater since the water is warm enough that you do not need a wetsuit but the rock edges can be rough on bare skin if kids are climbing around the entry area. The rash guard also provides a layer of comfort in the humid environment and protects from any minor scrapes.
What to Bring and How to Prepare
Pack swimsuits, towels, and a change of dry clothes for after your session. The Crater has changing facilities and showers, but bringing your own towels is recommended as the provided ones can be basic. The tunnel to the Crater can be a bit slippery, so water shoes or sandals with good grip are helpful for the walk in and out. Flip-flops work but something with a heel strap is more secure, especially for kids who might be excited and moving fast.
Leave your phones and cameras behind unless they are fully waterproof. The humidity inside the dome is intense and will fog up any non-waterproof electronics instantly. There are spots where you can take photos from the viewing area above the water before you go in for your swim session. Some families take their photos first and then change into swimsuits, which is a smart strategy for getting those magical dome shots without risking your phone near the water.
A waterproof dry bag is invaluable for keeping your belongings safe while you swim. There are cubbies and storage areas near the water but nothing is locked, and the humid environment means everything gets damp even if it does not get wet directly. Put your car keys, wallet, and any valuables in a dry bag and you will not spend your swim session worrying about your stuff. After your session, the dry clothes you packed will feel amazing since coming out of the warm humid dome into the crisp mountain air is quite a temperature contrast.
Age Considerations and Safety
The Crater is a natural geological formation and while it is managed for safety, it is not a standard swimming pool with uniform depths and traditional lifeguard setups. Kids should be comfortable in water and parents should be actively supervising at all times. The varying depths, the dim lighting inside the dome, and the unfamiliar environment mean this is not the place for kids who are still learning to swim to be unattended, even for a moment.
For toddlers and very young swimmers, the experience can be either magical or overwhelming depending on the child. The dark dome, the echoing sounds, and the warm water can be a lot of sensory input for little ones. We brought our kids starting at age three and they loved it, but they were already comfortable in water and not easily spooked by unusual environments. For more cautious kids, talk about what to expect before you arrive and maybe show them photos so the dome does not come as a complete surprise. Some kids need a few minutes to adjust to the atmosphere before they are ready to get in the water.
Older kids and teenagers tend to absolutely love the Crater without reservation. The novelty of swimming inside a rock dome, the warm water, the ability to jump off the platform, and the general cool factor of the whole experience makes it a huge hit with the tween and teen crowd. This is the kind of activity that even the most seen-it-all teenager will post about on their social media, which is basically the highest compliment that demographic can give any family activity.
Combining the Crater with Other Midway Adventures
The Homestead Crater is located in Midway, which means you can easily combine it with other attractions in the area for a full day trip from Park City. In winter, pairing a morning Crater session with an afternoon or evening visit to the Ice Castles at Soldier Hollow creates what might be the most unique day of activities in all of Utah: swimming in a volcanic hot spring and then walking through hand-carved ice sculptures, all within 20 minutes of each other.
In summer, Midway offers additional outdoor activities including mountain biking trails, fishing at Deer Creek Reservoir, and the charming town center with its Swiss-influenced architecture and local shops. The Crater pairs beautifully with a relaxed lunch in Midway and an afternoon of exploring the area. Soldier Hollow also offers summer tubing on their alpine coaster and other warm-weather activities that complement a morning swim perfectly.
The Homestead Resort itself has a golf course, spa, and dining options if you want to extend your visit. Some families make a whole day of it by doing the Crater swim, having lunch at the resort restaurant, and then exploring Midway before heading back to Park City. The 20-minute drive between Park City and Midway through the Heber Valley is scenic and easy, making this day trip combination one of our most-recommended itineraries for visiting families who want to experience something truly different and unforgettable.
Booking Tips and Practical Details
Reservations are essential, especially for weekend and holiday sessions. Book online through the Homestead Resort website as far in advance as possible. Summer and holiday week sessions sell out quickly, and being flexible with your timing gives you the best chance of getting a slot that works for your family. Weekday mornings tend to be the least crowded sessions if you have scheduling flexibility, and smaller crowds mean a more peaceful and intimate experience inside the dome.
Pricing is per person for the swimming sessions, with reduced rates for children under certain ages. Snorkeling and scuba sessions cost more and include equipment. Check the current pricing on the resort website since rates can change seasonally. Even at full price, this is one of those experiences that everyone in the family will agree was worth every penny. We have taken dozens of visiting friends and family members to the Crater over the years and the reaction is universally amazement and gratitude that we shared this hidden gem with them.
Allow at least two hours for the entire experience including changing, the walk in and out, your swim session, and getting cleaned up afterward. The showers after your session are important since the mineral water should be rinsed off, especially from kids hair which can get a bit stiff from the mineral content if left unwashed. Bring shampoo and conditioner along with your towels to make the post-swim cleanup thorough and comfortable. And bring a snack for the car because swimming in warm mineral water is surprisingly tiring and everyone will be hungry and happily exhausted on the drive back to Park City. A waterproof phone case lets you take photos worry-free. Do not forget the sunscreen - the UV at altitude is stronger than you think. Bring a reusable water bottle for everyone - staying hydrated makes a huge difference with kids.
Water Adventure Essentials
Here are our tried-and-tested picks for this trip: