Lake Vermilion-Soudan State Park
Descend half a mile into the earth. Ride a cage elevator through rock that formed 2.7 billion years ago, when this land was still underwater. Then climb aboard a rail car and travel three-quarters of a mile through tunnels where Finnish and Scandinavian miners once chipped away at some of the richest iron ore deposits ever discovered. You’re not in a museum—you’re in Minnesota’s first iron mine, and it’s still telling stories.
Lake Vermilion-Soudan Underground Mine State Park is unlike any state park in America. It combines two extraordinary experiences: the haunting depths of the Soudan Underground Mine—the state’s oldest, deepest, and most intact iron mine—with the pristine wilderness shores of Lake Vermilion, one of Minnesota’s most beautiful and least developed major lakes.
Above ground, you’ll find 33 campsites tucked into boreal forest, eight year-round camper cabins, miles of hiking trails through ancient geology, and access to a 40,000-acre lake dotted with over 400 islands. Below ground, you’ll find history frozen in time at 51°F, surrounded by rock older than most life on Earth. And in a side tunnel, physicists from around the world are conducting experiments to detect dark matter and study neutrinos. The mine that helped build America is now helping us understand the universe.
What Makes This Park Extraordinary
Underground Mine Tours
Descend 2,341 feet into Minnesota’s first and deepest iron mine—one of the most unique experiences in any U.S. state park.
Lake Vermilion
40,000 acres and 400+ islands—pristine northern Minnesota wilderness accessible by boat.
Year-Round Cabins
Eight heated camper cabins for four-season stays in the Northwoods.
Active Physics Lab
Underground experiments searching for dark matter and studying cosmic particles.
The Story of the Soudan Mine
In 1882, prospectors discovered iron ore along the shores of a lake that would later be called Vermilion. What they found was extraordinary: incredibly pure hematite, some of the richest iron ore on the continent. Within two years, the Soudan Mine was operational, and within a decade, it had transformed the remote wilderness into a booming industrial operation that would help build the railroads, skyscrapers, and battleships of a growing nation.
The Mining Era (1884-1962)
For 78 years, miners descended into the earth, first by ladder, then by cage elevator, boring ever deeper into billion-year-old Precambrian rock. The work was dangerous, the conditions harsh. Underground temperatures held steady at 51°F—a relief in summer, brutal in winter. Miners worked by candlelight before electricity arrived, hauling ore to the surface using increasingly sophisticated equipment.
At its peak, the Soudan Mine employed hundreds of men—many of them immigrants from Finland, Sweden, Norway, and Cornwall who brought their mining expertise to the Minnesota frontier. The towns of Tower and Soudan grew around the mine, their populations rising and falling with the price of ore.
By the 1950s, economics had shifted. Open-pit mining on the Mesabi Range proved cheaper than underground extraction, and on April 1, 1962, the Soudan Mine shipped its last ore. Rather than flooding the tunnels as was common practice, US Steel donated the site to the state. The equipment stayed in place. The elevators kept running. The mine became a time capsule.
From Mine to Park to Physics Lab
The state opened the mine for tours in 1965, allowing visitors to experience what had been strictly off-limits industrial territory. But the story didn’t end there. In the 1980s, physicists realized that the Soudan Mine offered something invaluable: 2,341 feet of rock shielding that blocked cosmic rays and provided an ideal environment for sensitive experiments.
Today, the mine houses the Soudan Underground Laboratory, operated by the University of Minnesota and Fermilab. Scientists conduct experiments searching for dark matter (the CDMS and SuperCDMS projects) and studying neutrinos. You may see their equipment during certain tours—cutting-edge physics happening in a 19th-century iron mine, surrounded by rock that was ancient when dinosaurs were new.
Underground Mine Tours
⚠️ Important: Tours Currently Suspended
As of 2024, underground mine tours are suspended until spring 2026 due to flooding from an extreme weather event. Surface tours of mine facilities remain available. Check the MN DNR website for current status.
What to Expect When Tours Resume
The underground experience is unforgettable:
| Tour Element | Details |
|---|---|
| ⬇️ Cage Descent | Drop 2,341 feet (~1/2 mile) in a mining cage elevator |
| 🚂 Rail Ride | Travel 3/4 mile through tunnels on original ore train |
| 🌡️ Temperature | 51°F year-round—bring a jacket! |
| ⏱️ Duration | Approximately 75 minutes |
| 👟 What to Wear | Sturdy closed-toe shoes, warm layers |
Surface Tours (Currently Available)
While underground access is suspended, you can still explore the remarkable surface facilities:
- 🏗️ Dry House: Where miners changed into work clothes
- 🔧 Drill Shop: Original equipment and repair facilities
- ⚙️ Engine House: The massive machinery that ran the operation
- 🪨 Crusher Building: Where ore was processed before shipping
Surface tours run daily 10 AM – 4 PM, no reservations needed. Free with park vehicle permit.
Hiking Trails
The park offers several trails that showcase both the mining history and the stunning geology of the region:
| Trail | Distance | Difficulty | Highlights |
|---|---|---|---|
| 🥾 Hiking Club Trail | 2.4 mi loop | Moderate (hilly, rocky) | Banded iron formation views, Alaska Shaft overlook |
| 🌲 West Tower Mine Trail | 0.2 mi loop | Easy (boardwalk) | Open mine pits, deepest pit overlook |
| ⛰️ Alaska Shaft Trail | 2.4 mi loop | Moderate | Historic shaft site, forest scenery |
| 🚴 Mesabi Trail Connection | Variable | Easy (paved) | Regional bike trail access |
The Hiking Club Trail: A Geology Lesson
This 2.4-mile loop is the park’s signature hike, and it’s a journey through deep time. The trail winds through forests growing from rock that formed 2.7 billion years ago—some of the oldest exposed geology in North America. Watch for the distinctive banded iron formation: alternating layers of red iron-rich rock and dark, silica-rich bands that tell the story of ancient seas and the first oxygen-producing life on Earth.
The trail is hilly and rocky in places—wear sturdy hiking shoes and watch your footing. The Alaska Shaft overlook provides views of one of the mine’s secondary shafts and excellent interpretive signage explaining the mining operations.
Lake Vermilion Access
Lake Vermilion is one of Minnesota’s crown jewels—40,000 acres of pristine water dotted with over 400 islands, 1,200 miles of shoreline, and some of the best fishing in the state. The park provides two access points:
| Access Point | Facilities | Best For |
|---|---|---|
| 🚤 Cable Bay Boat Launch | Concrete ramp, trailer parking, dock | Motorboats, larger watercraft |
| 🌳 Armstrong Bay Day Use | Beach, picnic area, restrooms | Swimming, picnicking, kayak/canoe launch |
Fishing on Lake Vermilion
Vermilion is legendary among anglers. The lake supports healthy populations of walleye, northern pike, smallmouth bass, muskellunge, and panfish. The complex shoreline with countless islands, reefs, and underwater structure creates ideal habitat.
🎣 Fishing Insider Tips
- Walleye: Best in spring and fall; target rocky points and reefs at dawn/dusk
- Smallmouth Bass: Summer hot – look for rocky shorelines and island points
- Northern Pike: Shallow bays with vegetation in spring and fall
- Muskie: Present but challenging – fall is prime season
camping“>Camping & Lodging
The park offers diverse overnight options, from tent sites to year-round cabins:
Main Campground
| Site Type | Count | Amenities |
|---|---|---|
| ⛺ Drive-In Sites | 33 | Electric, Wi-Fi, modern showers |
| 👥 Group Camps | 3 | Screened shelters, group facilities |
| 🥾 Hike-In Sites | 5 | Primitive, secluded |
| 🚣 Boat-In Sites | 2 | Lake access only, primitive |
Camper Cabins
The park’s eight camper cabins are available year-round—perfect for winter visits when you want to explore the snow-covered mine facilities and ski the trails without sleeping in a tent at -20°F:
- 🛏️ Sleeps: 4-6 guests
- 🔥 Heat: Electric or wood stove
- 💡 Lights: Electric
- 🚿 Facilities: Nearby shower building
Hinsdale Island (Remote)
For true wilderness seekers, the park manages the remote Hinsdale Island campground in Kabetogama State Forest. It’s only accessible by water, operates first-come first-served, and offers solitude that’s increasingly rare in Minnesota.
When to Visit: The Seasonal Guide
🌸 Spring (April – May)
The ice leaves Lake Vermilion typically mid-to-late April, and the forest awakens with migrating warblers and emerging wildflowers. Fishing opens, and the walleye bite is often excellent. Trail conditions can be muddy—waterproof boots recommended. Surface mine tours operate; check underground tour status.
Best for: Birdwatchers, anglers, photographers
☀️ Summer (June – August)
Peak season. The lake is warm enough for swimming at Armstrong Bay, and fishing remains strong (early morning and evening for walleye). Campgrounds fill on weekends—reserve ahead. Underground mine tours (when available) provide cool relief from summer heat. Evenings are magical with long northern twilights and occasional northern lights.
Best for: Families, camping, water activities, mine tours
🍂 Fall (September – October)
Spectacular. The northern hardwoods burst into color against the dark green of boreal conifers. Crowds thin dramatically after Labor Day. Fishing peaks again as water cools. This is peak muskie season and excellent for all species. The mine’s underground temperature feels warmer relative to cooling surface air.
Best for: Photographers, anglers, solitude seekers
❄️ Winter (November – March)
The Northwoods transform. Cross-country skiing and snowshoeing are excellent on designated trails. Snowmobile trails connect to regional networks. The camper cabins become cozy wood-stove retreats. Underground mine tours (when available) offer a respite from sub-zero surface temperatures—at 51°F underground, it can feel tropical compared to a -10°F January day.
Best for: Winter adventurers, cabin stays, snowmobilers, unique mine experience
The Photographer’s Guide
| Shot | Location | Best Time |
|---|---|---|
| 🏗️ Mine Headframe | Main entrance area | Late afternoon (warm light) |
| 🌅 Lake Vermilion Sunrise | Armstrong Bay Day Use | Dawn (reflections) |
| 🍂 Fall Colors + Mine | Hiking Club Trail | Late September, morning |
| ⛏️ Underground (when open) | Mine tunnels | During tours (tripod restrictions may apply) |
| ❄️ Winter Mine | Surface facilities | After fresh snow |
Sample Itineraries
⭐ The Perfect Day (Mine Focus)
- 9:00 AM: Arrive at mine visitor center
- 9:30 AM: Surface tour of mine facilities
- 11:00 AM: Underground mine tour (when available)
- 1:00 PM: Lunch in Tower or Soudan
- 2:30 PM: Hike the Hiking Club Trail (2.4 mi)
- 5:00 PM: Drive to Armstrong Bay Day Use for sunset over Lake Vermilion
🌟 The Weekend Explorer (2 Days)
Day 1:
- Morning: Travel to park, set up camp or check into cabin
- Afternoon: Surface tour of mine (or full underground when available)
- Evening: Campfire, stargazing (minimal light pollution here)
Day 2:
- Early morning: Fishing on Lake Vermilion or sunrise photography at Armstrong Bay
- Mid-morning: Hiking Club Trail with geology focus
- Lunch: Local restaurant in Tower
- Afternoon: Paddle Lake Vermilion, explore islands
💪 The Winter Escape (Cabin Stay)
- Friday evening: Arrive, settle into camper cabin, fire up wood stove
- Saturday: Snowshoe or ski trails, surface mine tour, warm up with cocoa
- Sunday: Sleep in, leisurely breakfast, explore downtown Tower, depart
Practical Information
| Item | Details |
|---|---|
| 🎟️ Vehicle Permit | $7/day or $35/year (Minnesota State Parks pass) |
| ⛏️ Mine Tour Cost | Check current pricing at dnr.state.mn.us |
| 🏕️ Camping | From $23/night (electric sites) |
| 🏠 Cabins | From $70/night |
| 🔥 Firewood | Campfire permit required ($8/day, includes firewood) |
Getting There
- 📍 From Minneapolis/St. Paul: ~5 hours north via US-169
- 📍 From Duluth: ~1.5 hours north via US-53 and MN-169
- 📍 Nearest Town: Tower, MN (immediate)
- ⚠️ GPS Warning: GPS may give incorrect directions to the mine entrance. Follow street signs once in Tower.
Frequently Asked Questions
When will underground mine tours reopen?
Underground tours are scheduled to resume in spring 2026 following flood remediation from a 2024 extreme weather event. Surface tours remain available. Check the Minnesota DNR website for current status.
How cold is it underground?
The mine maintains a constant 51°F (11°C) year-round. Bring a jacket or sweater even in summer—it feels cold after being in the heat. In winter, it may feel relatively warm compared to sub-zero surface temperatures.
Can I fish in Lake Vermilion from the park?
Yes! Use the Cable Bay boat launch for motorized boats or Armstrong Bay for kayak/canoe access. Minnesota fishing license required. The lake has excellent walleye, pike, bass, and muskie populations.
Are the cabins heated in winter?
Yes. The camper cabins have either electric heat or wood stoves and are available year-round. They’re especially popular for winter escapes when tent camping isn’t practical.
What’s the physics lab in the mine?
The Soudan Underground Laboratory is operated by the University of Minnesota and Fermilab. The 2,341 feet of rock above filters out cosmic rays, making it ideal for sensitive experiments. Scientists are searching for dark matter and studying neutrinos. You may see some of this equipment during certain tours.
Is this park good for kids?
Absolutely. Children are typically fascinated by the mine experience—the cage elevator, the rail ride, the underground tunnels. The Armstrong Bay beach provides summer swimming. The Mesabi Trail offers easy biking for families.
⛏️ Where History, Science, and Wilderness Converge
Lake Vermilion-Soudan Underground Mine State Park offers something no other state park in America can match: a journey half a mile into billion-year-old rock where miners once labored and scientists now search for the secrets of the universe. Above ground, Lake Vermilion’s 40,000 acres of pristine wilderness await. Below, Minnesota’s deepest mine tells stories that span centuries of human effort and eons of geological time.
📍 Address: 1302 McKinley Park Rd, Soudan, MN 55782
📞 Phone: (218) 300-7000
🔗 Reservations: reservemn.usedirect.com
Frequently Asked Questions
How much is a Minnesota state parks vehicle permit?
A daily vehicle permit costs $7. An annual vehicle permit costs $35 and covers unlimited entry to all 75+ Minnesota state parks and recreation areas throughout the year.
Where is the source of the Mississippi River?
The Mississippi River begins at Lake Itasca in Itasca State Park, Minnesota. Visitors can walk across the river at its headwaters where it flows just 18 feet wide and knee-deep over a rocky streambed.
Can I see the Northern Lights at Minnesota state parks?
Yes, northern Minnesota parks like Voyageurs, Scenic, and Lake Bemidji offer some of the best Northern Lights viewing in the continental US, especially during fall and winter when skies are darkest.
What are the best state parks on the North Shore?
Top North Shore parks include Gooseberry Falls, Split Rock Lighthouse, Tettegouche, Temperance River, and Judge C.R. Magney (home of Devil’s Kettle waterfall). All are connected by the Superior Hiking Trail.
Explore More Minnesota State Parks
Lake Vermilion-Soudan State Park is one of many outstanding state parks in Minnesota. Discover more parks in our Best State Parks in Minnesota guide, or use our Park Finder to search by activity, location, or features.
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