Gigantic Warm Spring is a large natural warm spring located approximately 12–14 miles north of Lewistown, in the central-eastern part of Montana. Set on the grounds of Vanek’s Paradise Ranch, it is often referred to as the “World’s Largest Warm Spring” and is sometimes described as the third largest natural spring in the world, mainly due to the extraordinary volume of water flowing from it. The spring produces around 50,000 gallons of water per minute, with the water temperature remaining consistently around 68°F (20°C) throughout the year.
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What You Should Know Before Going to Gigantic Warm Spring
Gigantic Warm Spring is not a traditional hot springs resort or spa. Instead, it functions as a natural outdoor swimming area, where the water is warm rather than hot, giving the entire place a very different character compared to typical geothermal pools. Because of this, the spring is especially popular during hot summer days, when visitors come to swim, relax, or enjoy a picnic in Montana’s open landscape.
The site features a large natural body of water, with depths reaching up to about 14 feet (4 meters) in some areas. Around the spring, you’ll find picnic tables, basic restrooms, and changing areas, but no luxury facilities or spa services. The water is completely natural and untreated, so it feels more like swimming in a warm natural pond than soaking in a controlled thermal pool.
Admission is usually paid on-site and typically costs just a few dollars per person, making Gigantic Warm Spring an accessible and popular spot for both locals and travelers during the summer months. Pets are not allowed in the area, and visitors are expected to follow a “pack it in, pack it out” policy, taking all trash with them to help preserve the natural setting.
How to Get to Gigantic Warm Spring
Gigantic Warm Spring is located approximately 14,7 miles north of Lewistown, in eastern Montana, and is easily accessible by car. From downtown Lewistown, head north on US-191 for about 9 to 10 miles. Then turn west onto MT-81, where signs will guide you toward the spring.
After a short drive on MT-81, turn onto Warm Spring Lane, which leads directly to the parking area near the spring. Parking is available very close to the water, followed by a short and easy walk to the swimming area. Roads are paved and well maintained, making the spring accessible to standard passenger vehicles.
Thanks to the open landscape and clear signage, navigation is straightforward even for first-time visitors to Montana.
Best Time to Visit Gigantic Warm Spring
Gigantic Warm Spring is a seasonal destination, best visited during the summer months from June through early September. This is when the site is open to the public and weather conditions in eastern Montana are most suitable for swimming. With water temperatures holding steady around 68°F (20°C), the spring feels refreshing on hot summer days and works well for both swimming and relaxing by the water.
July and August are typically the busiest months. For a quieter experience, June or late August into early September are good choices, offering warm weather with fewer visitors. Outside of the summer season, access is often limited or closed, so planning a visit during summer is strongly recommended.
Opening Hours & Entry Costs at Warm Spring
Gigantic Warm Spring operates on a seasonal basis during summer, typically from early June through early September. The official opening date is usually around June 1st, depending on weather conditions. The site generally closes on the Monday of Labor Day weekend, marking the end of the season.
During the summer season, the spring is open daily from 12:00 pm to 9:00 pm. It is a day-use area only, making it a good stop for an afternoon or early evening visit while traveling through eastern Montana.
An entry fee is charged at the gate, with pricing based on age groups. Fees are modest and reflect the simple, natural setting rather than a full-service resort. Visitors should expect walk-in access only, with no reservations required.
Where to Stay Nearby Gigantic Warm Spring
Gigantic Warm Spring does not offer on-site lodging and operates strictly as a day-use swimming area. For overnight stays, the best option is Lewistown, located about 14,7 miles south of the spring.
Lewistown is a small, relaxed town that serves as a practical base for exploring this part of eastern Montana. It offers basic services, dining options and several hotels suitable for road-trippers passing through the region.
Recommended Stays nearby Gigantic Warm Spring
Yogo Inn – Lewistown
A comfortable hotel in town featuring spacious rooms, an indoor pool and an on-site restaurant. It’s a reliable choice for travelers looking for convenience and a restful stay after visiting Gigantic Warm Spring.
The Calvert Hotel – Lewistown
A small historic hotel located downtown, offering simple, clean rooms and a more personal atmosphere. Its central location makes it easy to walk to nearby restaurants and shops.
You can explore more accommodation options in the area using the interactive map below:
What to Do Nearby Gigantic Warm Spring
The area around Gigantic Warm Spring is well suited for slow, relaxed travel and exploring a lesser-known part of Montana. Many visitors combine their soak with a picnic or a short walk through the open landscape surrounding the Moccasin Mountains.
A short drive away, Lewistown is worth a brief stop. You can stroll through the historic downtown area, grab a meal at a local restaurant, or visit the Central Montana Museum to learn more about the region’s history and settlement.
For light outdoor activity, the surrounding countryside offers easy walks and scenic viewpoints with wide-open views of prairie and distant mountain ranges. Trails here tend to be uncrowded, making the area appealing for travelers seeking quiet and space.
During summer, a visit to Gigantic Warm Spring also pairs nicely with wildlife watching or landscape photography, especially in the early morning or late evening when the light is soft and animal activity is higher.
Other Hot Springs Nearby Gigantic Warm Spring
If you’d like to combine Gigantic Warm Spring with additional soaking, there are a few other hot springs within a reasonable driving distance. One of the closer options is Broadwater Hot Springs near Helena. This well-developed complex features multiple pools with consistent temperatures and works well for a relaxed stop.
Another option is Fairmont Hot Springs Resort, located southwest of Lewistown. This larger resort offers several mineral pools and more extensive facilities, making it a good choice for travelers looking for a more comfortable soaking experience.
For those heading farther east across Montana, Sleeping Buffalo Hot Springs is worth considering. These quiet springs offer simple soaking in an open landscape and fit well into a slower-paced road trip through eastern Montana.