“A Brewery, A Ferry, Two Great Rivers, Morels, Lone Rocks and more in one big curve”
Quickie Summary: State “Trunk” Highway 133 twists and turns into a “c”-like arc around southwestern Wisconsin and the gorgeous Driftless Area. From the “World’s Longest Main Street Without an Intersection” in Potosi – and it’s now-legendary brewery – to the state’s only ferry service on the Mississippi in Cassville to picturesque views on ridges and valleys in the Driftless Area, Highway 133 is a fun little Frito Scoop-shaped drive in Wisconsin. It’s one of the few roads outside of Highway 35 to carry Wisconsin’s Great River Road designation for a stretch, and if you want great views and access to fun along the Mississippi AND Wisconsin Rivers, this is it!
Wisconsin Highway 133 Road Trip
The Drive (South to North): Highway 133 begins just outside of Tennyson, heading west from Highway 35 and U.S. Highway 61, the main north-south route through this part of the state. The Wisconsin Great River Road also turns from here off Highway 35 and onto 133 in Tennyson on the way into Potosi. The two burgs often work in conjunction with each other and the area bills itself as the “Catfish Capital of Wisconsin.”
Potosi
Beer is key in the history of Potosi (pop. 671), as well as its future. The National Brewery Museum and Library opened along Highway 133 around 2010 and offers tours every day (including Sundays) from 10am to 6pm. The Potosi Brewing Company busily brewed beer here from 1852 to 1972, and the former brewery’s buildings were renovated for the museum, which also features a microbrewery, a restaurant with an outdoor beer garden and a gift shop. It began re-opening in 2008 and has drawn and welcomed visitors ever since.
The Potosi Brewing Company fell into decline, as seen in this picture from the late ’90s above. Today (below, looking from the opposite direction), it’s the centerpiece of a resurrected brewery and museum.
Potosi Brewing & the National Brewery Museum
The National Brewery Museum conducted a national search for a location; candidates included Cincinnati, St. Louis and Milwaukee…but they chose little Potosi. Evidence of the Potosi Brewing Company is everywhere, including this tower (below) that serves as the World’s Largest Cone Top Beer Can. The cone-top can’s lower level opens to a bar that serves thirsty patrons at Potosi’s event space. Their main brand was known as “Good Old” Potosi Beer, which was brewed here for 120 years in its first incarnation. Today, they brew a larger variety of beers that get distributed throughout the Midwest.
The National Brewery Museum is located on the upper floors of the main building at Potosi Brewing Company. It features a dazzling array of memorabilia from breweries across Wisconsin and the nation, including a number of defunct breweries that go went back generations. From branded bottle openers to massive neon signs, you can view over a century’s worth of items. The library lets you research these breweries, and then you can enjoy craft beer made on-site in Potosi’s tap room and restaurant.
The Transportation Museum on the main floor features more memorabilia, focusing on older Potosi and other Wisconsin-based brews, plus a look at the transportation methods brewers used to ship their beer. Potosi Beer, for example, went via boats on the Mississippi River, via horse and wagon, train, and of course vehicle. Photos and even real-life examples are right in front of you in the transportation part of the museum.
Great River Road Interpretative Center
Highway 133 is one of the few sections of Wisconsin’s Great River Road that doesn’t follow Highway 35. The Wisconsin segment of the Great River Road hits 33 river communities, of which Potosi is southernmost. The Potosi Brewing Company hosts one of several interpretive centers in the state. Maps, guides, and more are here to help you discover what else is along the road to maximize the experience.
The Interpretive Center is in the lobby of the building. To your left is the Potosi Brewing Company restaurant and tap room; to the right, the Potosi Transportation Museum. The Gift Shop and historic caves are just ahead, and the National Brewery Museum is just up the stairs or elevator. This makes for a great stop along Highway 133 and the Great River Road!
Highway 133 serves as a long, long main street for Potosi. Past the downtown area and the National Brewery Museum, you pass St. John Mine. The mine was a natural cave worked by Native Americans and then European immigrants, both before and after the “Lead Rush” of 1827. The mine is named after Willis St, John, who made a small fortune in the first twenty years of the lead rush. Tours are available daily, and you can see stalactites (those icicle-looking rock things hanging down in caves) and realize that, whatever your working conditions are, you have it great compared to 19th century miners.
The World’s Longest Main Street Without an Intersection is another claim to fame for Potosi. While others will dispute that, hey, who are we to question it? It IS long. And a nice drive, too. It’s a great vantage point for observing wildlife, since Potosi is perched on the Upper Mississippi River Refuge, part of the 261 mile-long stretch along the river that serves as home to countless waterfowl, fish and a huge variety of birds…including bald eagles. We’ll cover more about that in Cassville.
Cassville
Ambling through Potosi for miles and miles, you descend towards the Mississippi River and then, shortly before reaching it, the road heads back inland a bit and parallels the river to Cassville (pop. 947), a pleasant yet remote burg on the Mississippi River. Cassville is considered one of the best sites in the Midwest for viewing eagles, as this is a prime area for their migration. Cassville was originally settled in 1827 and was named after the Territorial Governor of the time, Lewis Cass (this was Michigan Territory at the time, by the way.) The fledgling burg threw its hat in the ring to become the capitol of Wisconsin Territory when it was first organized in 1836. While it failed in that regard, it attracted a new resident, Nelson Dewey. Drawn to Cassville from his native New York State, Dewey became Wisconsin’s first Governor when it became a state in 1848.
State Trunk Tour Tidbit:
Cassville is the southermost Wisconsin community located directly on the Mississippi River.
Cassville is also known for the Cassville Car Ferry (608-725-5180), which makes the run from Cassville to Turkey Creek, Iowa. It’s the only river crossing between Dubuque and Prairie du Chien, and still serves as the oldest operating ferry service in Wisconsin – Cassville has been served by a river ferry in some form or another since 1833. Click here for a schedule and fare information. Highway 133 provides access to the Cassville Car Ferry via Crawford Street.
Cassville suffered significant economic hits when two major power plants ended up closing within a decade or so of each other. The town has been responding with a strong push to showcase its assets for visitors, and a lot of small businesses are finding Cassville an attractive new place to set up shop; we noticed the momentum on our last trip through. For recreation, relaxation, hiking or even camping, a great stop is Nelson Dewey State Park, which begins right across from Stonefield. The State Park covers 756 acres of Stonefield’s original 2,000 and offers bird watching, picnicking and six hiking trails. You can also find various Indian mounds. The park is just north of Cassville; follow County Highway VV just off Highway 133 and it will take you right to it.
Right across the street is one of Cassville’s other historic attractions; Stonefield is a 2,000 acre State Historic site that was once the country estate of the aforementioned Nelson Dewey. When the house was completed in 1868, one Wisconsin newspaper described it as “the showplace of Wisconsin with its beautiful green lawns, gardens and orchards, stables and other buildings, and miles of stone fences.” The original home burned down in 1873, but it was rebuilt by General Walter Cass in the 1890s for his home, a building which still stands today. The land was acquired by the Wisconsin Conservation Commission in 1936, and the State designated the area a historic site in 1954. Today, it houses a cornucopia of historical treasures, including the State Agricultural Museum. Completed in 1971, the Museum houses Wisconsin’s largest collection of farm tools, models and machinery detailing Wisconsin’s agricultural history. There’s also a railroad display and a recreated farming village. Check it all out in greater detail here.
In downtown Cassville, you connect with Highway 81 which heads out to the county seat, Lancaster, as well as Platteville and points east. Highway 133, after a long trek southwest, west and northwest since Tennyson, begins heading north and northeast (part of the big “C” shape the entire route makes in its entirety) and winds through more bluffs and valleys through North Andover to Bloomington (pop. 701), where it meets up with Highway 35. Highway 133 joins 35 for several miles before arriving at U.S. Highway 18. While Highway 35 heads west with 18 towards Prairie du Chien, 133 joins U.S. 18 for the ride east, along the Military Ridge for about 6 miles before heading north again at Mount Hope.
Highway 133 ambles through some beautiful hills and valleys approaching the Wisconsin River; when you reach the river (though it’s tough to see through all the trees), 133 turns northeast, paralleling the river’s southern shore but often inland by several blocks or even a mile. It all depends on the backwaters and towns.
Boscobel
Pretty much everywhere a bridge crosses the Wisconsin River on this stretch, you’ll find a town. One of them is Boscobel (pop. 3,047), Wisconsin’s “Wild Turkey Hunting Capital”. So, if you feel like hunting wild turkeys, you’re in luck. Boscobel is also the birthplace of the Gideon Bible and the Gideon Society… so the people who got the idea for placing Bibles in hotels and motels all over the country came from here. Boscobel offers up a beautiful downtown lined with a number of well-preserved – or adapted – 19th century buildings; fans of architecture should check it out, several blocks east of Highway 133 at the U.S. 61 crossing. The Rock School (207 Buchanan Street) is another stunner, once shockingly designated for demolition. Boscobel Station, built in 1857, has historically served as a “nerve center” of town and includes a new museum.
Out of Boscobel, Highway 133 makes a beeline towards the village of Blue River (pop. 429). Near Blue River is Eagle Cave (16320 Cavern Lane, 608-537-2988), the state’s largest onyx cave. It was discovered back in 1849, although it was almost ninety years before the cave was opened to the public. It’s a popular camping location and a cave exploratory program gives people a comprehensive tour.
Muscoda
It’s another straight shot to Highway 80 and Muscoda (pop. 1,400), the “Morel Mushroom Capital of Wisconsin.” The city holds an annual Morel Mushroom Festival featuring the tasty fungi, considered a delicacy in French cooking – and despite looking like an undersea sponge, morels really do taste great in a variety of dishes (the butter also helps.)
From Muscoda heading east, Highway 80 joins 133 for several miles before breaking south towards Highland and Cobb – and eventually the Illinois line south of Cuba City. Meanwhile, Highway 133 heads through Avoca (pop. 608), named after the town in Ireland (and yes, they have a St. Patty’s Day parade.) The nearby Avoca Prairie features the largest tallgrass east of the Mississippi River. You can reach it by turning north on Hay Road off 133 just east of town. Depending on how much rain there’s been, it’s sometimes easier to reach the Avoca Prairie by canoe!
While much of this stretch goes through marshland, eventually you move upwards and Highway 133 lines the southern hill along the Wisconsin River. Depending on weather and density of the trees, the sights of the river can be quite enjoyable – but since this is a narrow and occasionally curvy stretch, be careful! Before you know it, Highway 133 meets Highway 130. (Highway 130 heads south and east towards Highway 23; it’s a good access road for House on the Rock, Governor Dodge State Park, and Dodgeville, if you want to check those places out!)
The New Wisconsin River Bridge carrying Highway 133 (and 130)
In 2024, a new set of bridges opened across the Wisconsin River carrying Highways 130 & 133 in and out of Lone Rock. Here are some photos of the old bridges they replaced, which dated back to the 1930s and 1940s with some updates since:
Above: Between Avoca and Lone Rock, Highway 133 hugs the shore above the Wisconsin River, the view of which varies based on how thick the trees are; the river is to the left in this shot. This is approaching the crossing of what is now the old bridge, which was removed in late 2024.
The newer, wider (though much less interesting) bridges opened in Fall 2024.
Lone Rock
The final destination for Highway 133 is Lone Rock (pop. 929). Named after a large sandstone rock that served as a navigation point along the Wisconsin River, little is left of the actual rock; it was used extensive in the late 19th and early 20th centuries to help build the town’s houses.
Lots of Wisconsin cities have registered low temperatures, but the -53 on January 30, 1951 gave Lone Rock claim as the coldest place in the United States, at least for a while (you knew a place in Minnesota would eventually get colder). But they play off the “cold hands, warm heart” saying with this sign below along U.S. 14/Highway 60, just past of the end of Highway 133.
Just north of the Wisconsin River, Highway 133 comes to an end approaching Highway 60 & U.S. 14 on the north end of Lone Rock. You can head west to La Crosse, Richland Center, or Prairie du Chien, or east towards Spring Green, Madison and points east.
CONNECTIONS:
South Terminus:
Can connect immediately to: Highway 35, U.S. Highway 61
Can connect nearby to: U.S. Highway 151, about 8 miles southeast
North Terminus:
Can connect immediately to: Highway 60, Highway 130, U.S. Highway 14
Can connect nearby to: Highway 23, about 7 miles east
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