Loess Hills Scenic Byway — Part 1

Akron to Council Bluffs

Western Iowa · Iowa · United States

Key measurements

Distance

157.7 miles

Elevation gain

4,480 ft

Elevation loss

4,601 ft

High point

1,416 ft

Low point

1,007 ft

Net change

-124 ft (1,150 ft to 1,026 ft)

Surface

Paved

Route type

point-to-point

Route Overview

This 157.7-mile route traverses the western border of Iowa, tracing the unique landforms of the Loess Hills from Akron south to Council Bluffs. Formed at the end of the last ice age by wind-blown silt deposited along the eastern edge of the Missouri River valley, these hills are defined by sharp, narrow ridgelines, steep-sided hollows, and abrupt transitions to flat river bottomland.

The trip begins in the Big Sioux River valley at Akron, initially following the western bluff margins along Iowa Highway 12. After a brief transit across the flat Missouri River floodplain on Interstate 29, the route cuts back inland onto a sequence of state highways and county backroads. These secondary roads thread through deep loess draws, high ridge crests, and quiet agricultural valleys. Elevation ranges from a low of 1,007 feet near the floodplain to a high point of 1,416 feet along the central ridge crests around Mile 92.5, delivering a mix of sweeping upland views and tight valley contours before dropping into Council Bluffs along East Kanesville Boulevard.

Key Segments & Geographic Transitions

Northern Departure at Akron — Miles 0.0–0.4

Starting in Akron along the Big Sioux River valley, this short initial segment transitions out of town onto Iowa Highway 12. The land here marks the northernmost fringe of the loess deposits, where low rolling hills meet agricultural fields along the riverbank.

Big Sioux Valley to Loess Bluff Line — Miles 6.1–26.3

Following Iowa Highway 12 south, the road hugs the eastern wall of the Big Sioux valley. The terrain quickly sharpens into distinct bluffs on the left with flat, worked river plain on the right. Curves follow the natural contour of the bluffs as the highway runs parallel to the South Dakota border.

Missouri River Floodplain Bypass — Miles 37.6–50.5

Connecting the northern loess section to the central ridges requires a stretch on Interstate 29. This segment drops onto the dead-flat alluvial bottomland of the Missouri River plain, offering high-speed transit across industrial and agricultural land south of Sioux City.

IA-141 Inward Climb — Miles 50.9–66.9

Leaving the interstate, Iowa Highway 141 strikes southeast, climbing off the floodplain and back into the rolling agricultural interior. The road broadens into long, rolling grades across open farmland, crossing low creek beds and farmstead access points.

County Highway L20 Ridge Road — Miles 75.0–82.9

County Highway L20 shifts the route onto two-lane rural pavement that climbs onto narrow ridge crests. Topography tightens noticeably here, with short, blind vertical crests and sharp turns following the natural spines of wind-deposited silt.

County Highway L16 Ravine Traverse — Miles 90.1–97.0

Crossing into deeper loess country, County Highway L16 negotiates steep draws and wooded ravines. This segment contains the high point of the trip at Mile 92.5 (1,416 feet), featuring dramatic drops on either side of the road and tight, technical contouring through native prairie remnants and oak savannahs.

IA-183 Central Loess Spine — Miles 98.0–114.7

Iowa Highway 183 runs south through the heart of the Harrison County hills. This is quintessential Loess Hills landscape: the road twists through deeply carved valleys and along mid-slope terraces, passing isolated farmsteads and steep loess cut-banks where raw yellow silt is exposed along the roadside.

IA-127 Cross-Cut — Miles 114.9–126.4

Heading east across the hill grain on Iowa Highway 127, the road cuts perpendicular to several small drainage valleys. The profile becomes a series of climb-and-descent cycles, transitioning from wooded ravines to open upland crests.

Overton Avenue Backroad Ridge — Miles 127.0–137.6

Overton Avenue provides a quiet, narrow paved corridor through rural Pottawattamie County. The road conforms strictly to the landscape, looping across farm ridge tops with minimal shoulder space and sweeping vistas of the surrounding crop ground.

County Highway L34 Southern Run — Miles 137.8–142.9

County Highway L34 continues the south-bound alignment through gently undulating loess terrain. The hills begin to broaden and smooth out compared to the rugged ridges further north, but the road remains active with frequent elevation changes and quick direction shifts.

G8L Upper Bluff Approach — Miles 152.6–155.7

Approaching the Council Bluffs metro area, local route G8L tracks along the high eastern bluffs overlooking the Missouri River valley floor. Suburban acreage homes and woodland replace row crops as the city limits draw near.

East Kanesville Boulevard Urban Descent — Miles 156.0–157.5

The route terminates along East Kanesville Boulevard, descending a natural loess ravine straight into central Council Bluffs. Traffic density increases rapidly as the road drops to the lower valley floor, ending in the heart of the urban grid at East Broadway.

Seasonal & Environmental Context

Spring and autumn offer the clearest visibility across the ridges, though farm activity peaks significantly in fall. Heavy rain events pose a unique threat in this region: loess soil lacks clay structure and erodes rapidly, frequently washing fine yellow silt and mud onto low-lying corners or near agricultural driveway cuts. High crosswinds are common whenever the route tops ridge crests or crosses the open floodplain on I-29.

Logistics & Services

Fuel and basic food options are readily available at the terminals in Akron and Council Bluffs, as well as along the I-29 corridor. Options along the central county road segments (L20, L16, Overton Ave) are sparse; minor fuel stops exist in small towns adjacent to IA-183 and IA-127, but full services require dipping off the route to nearby highway junctions. Cell service is generally strong on the interstate and high ridges, but drops to weak or non-existent in the deep loess hollows on L16 and Overton Avenue.

Important Considerations

Gravel tracked onto the pavement at farm field entrances is a persistent hazard throughout the county road segments. Deer and wild turkey are abundant along the wooded draws of IA-183 and L16, particularly during early morning and late afternoon hours. Pavement surfaces on county routes like L20 and L16 frequently exhibit frost heaves and sharp, unannounced edge drops where soil has eroded from the road shoulders.