Historic Bluff Country Scenic Byway

Dexter to La Crescent

Southeastern Minnesota · Minnesota · United States

Key measurements

Distance

88.8 miles

Elevation gain

1,743 ft

Elevation loss

2,482 ft

High point

1,424 ft

Low point

640 ft

Net change

-734 ft (1,420 ft to 686 ft)

Surface

Paved

Route type

point-to-point

Route Overview

This 88.8-mile west-to-east traverse crosses the full geomorphic shift of Southeast Minnesota, transitioning from the high, windswept glaciated agricultural plains of Mower County into the deeply dissected limestone bluffs of the unglaciated Driftless Area. Starting near Dexter at over 1,400 feet above sea level, the route picks up Minnesota State Highway 16—the Historic Root River State Scenic Byway—and descends more than 780 feet along the meandering cut of the Root River, ultimately dropping to the Mississippi River floodplain at La Crescent.

The route presents two distinct personalities: broad, high-visibility farm-country rollers on the western end, giving way to tight valley curves, rock overhangs, and canopy-covered river bottoms through Fillmore and Houston counties.

Key Segments & Geographic Transitions

Dexter Departure — Miles 0.0–0.7

The route begins in Dexter on local Road 7, departing the small grid of the town across flat agricultural terrain. Sightlines are clear and open, framed by row crops and farmsteads.

Glaciated Prairie Highs — Miles 1.5–7.2

Joining MN-16 eastbound, the road crests the route’s high point of 1,424 feet near mile 1.5. This section traverses classic upper Midwest till plains—straight stretches punctuated by broad, gentle rises and wide-open sky as you move toward the headwaters of the region's drainage network.

Upper Root River & Karst Descent — Miles 7.7–41.0

As the route passes through Fillmore County, the landscape breaks into classic Driftless karst terrain. Rolling fields yield to sinkholes, wooded draws, and shallow valleys. Crossing through small valley hubs, the highway begins to follow the natural contours carved by the river, with gentle curves tightening as the valley walls grow taller and steeper.

Root River Bluff Country — Miles 41.4–82.5

This extended stretch forms the scenic heart of the ride along the Root River floor. Hemmed in by towering limestone and dolomite bluffs, MN-16 ribbons closely along the riverbank. Shadows deepen beneath dense oak, maple, and walnut canopy, and the road follows a continuous series of sweeping curves tailored to the canyon walls.

Mississippi Valley Floor — Miles 83.1–88.0

Emerging from the Root River cut, the route approaches the Mississippi River trench. The roadway flattens and wide marshes open up, dropping to the low point of 640 feet at mile 84.4 before concluding along the Disabled American Veterans Highway corridor at La Crescent, nestled beneath the high Mississippi River bluffs.

Seasonal & Environmental Context

Spring brings heavy agricultural runoff and residual winter sand in shade-heavy river bottom curves, along with rapid water level rises along low-lying sections of the Root River. Summer features lush hardwood canopies that trap humidity and keep valley temperatures cooler than the open western plains, though early morning fog frequently settles in the river lowlands.

Autumn is peak season along this corridor: leaf-peeping traffic swells on autumn weekends, and agricultural equipment on the western prairie section moves heavily during harvest. Watch for fallen, wet leaf cover on tight bluff-side corners.

Logistics & Services

Fuel and essential services are regularly spaced along the MN-16 corridor, with small river towns situated roughly every 10 to 15 miles along the middle and eastern stretches of the ride.

Cellular coverage is reliable on the high prairie of the western miles and high bluff shoulders, but drops out intermittently along the deepest rock cuts and river bottoms between miles 45 and 75.

Important Considerations

Wildlife: The forested coulees and crop-edge margins of the Driftless Region host dense white-tailed deer populations; activity peaks heavily at dawn and dusk throughout the river valley. * Road Surface Hazards: Weathering along steep limestone cuts can deposit loose gravel and rock fragments into the lane edge, particularly after summer thunderstorms or spring thaw cycles. * Recreational Traffic: The Root River State Trail closely parallels MN-16 through much of the valley, creating frequent slow-moving vehicular and pedestrian crossings near town centers.