Harrison County in western Iowa is defined by a dramatic contrast between the broad low ground around Missouri Valley and Mondamin and the tightly folded ridges that dominate the central and eastern interior. Missouri Valley, Logan, Woodbine, Dunlap, Mondamin, and Persia provide useful town references across this changing landscape. I-29 follows the western lowlands, while U.S. 30 links Dunlap, Woodbine, Logan, and the Missouri Valley road network. Iowa 44, 127, 183, and 191 provide additional orientation in the interior and along the edges. This page explains the supplied county, city, terrain-and-water, and elevation maps, and high-resolution JPG versions can be downloaded in a ZIP near the end of the article. High-resolution map files are available for download in the section below.
The easiest way to read the county is to begin with Missouri Valley in the southwest and Logan near the center. Missouri Valley sits close to the broad western lowlands, while Logan lies where the terrain becomes much more dissected. Woodbine and Dunlap continue northeast along the U.S. 30 corridor, Mondamin anchors the west-central side, and Persia helps locate the southeastern extension. The terrain sheets make the west-to-east change especially clear because the flat green lowland rises abruptly into long brown ridges and narrow creek valleys.
Table of Contents
Missouri Valley and Logan connect the western lowlands to the interior road network
Missouri Valley and Logan are the two strongest starting points on the general county map. Missouri Valley lies in the southwest near I-29 and the flatter western road pattern, while Logan is farther northeast in the hillier interior. U.S. 30 connects the broader corridor through Logan and continues toward Woodbine and Dunlap, making it a useful line for understanding how the main towns relate to one another.
Dunlap appears near the northeastern edge where U.S. 30 and Iowa 37 are close together. Woodbine sits southwest of Dunlap on the same general corridor. Mondamin is west-central near Iowa 127, Pisgah lies farther northwest near Iowa 183, and Persia anchors the southeastern extension near Iowa 191. These routes provide enough structure to orient the county without following every local farm road.
The western road network is relatively straight because it crosses broad low ground. In the central and eastern hills, roads are broken into shorter sections and bend more often around valleys and ridges. The general map is intended for county-scale orientation rather than live navigation, so current construction, closures, and exact access points should be checked with current transportation information.
Missouri Valley, Woodbine, and Logan lead a widely spaced city pattern
The city map ranks six major communities: Missouri Valley first, Woodbine second, Logan third, followed by Dunlap, Mondamin, and Persia. The three largest labeled towns are separated across the southwest, center, and northeast rather than clustered in one urban area. That spacing reflects a county made up of distinct lowland and hill districts connected by a small number of major road corridors.
Missouri Valley is the clearest reference for the western lowland, while Logan provides the strongest central landmark in the ridge country. Woodbine sits northeast of Logan and is closely tied to the U.S. 30 corridor. Dunlap is farther northeast, Mondamin is in the west-central lowland, and Persia marks the southeastern section. The city map also labels Monona, Crawford, Shelby, and Pottawattamie counties around Harrison County for regional context.
The settlement pattern becomes more meaningful when it is compared with elevation. Missouri Valley and Mondamin are close to the broad green lowlands in the west, while Logan and Woodbine sit among deeply dissected ridges and creek valleys. Dunlap occupies a northeastern valley corridor, and the land around Persia is also cut by narrow ridges and small streams. The towns therefore serve as practical markers for several distinct terrain zones.
Little Sioux River and Soldier River mark the northwestern lowland edge
The Little Sioux River is the clearest named waterway along the northwestern side of the terrain-and-water map. Soldier River runs farther east along the base of the hill country, and Soldier River Cutoff and Smith Lake are shown nearby. These features help define the transition between the broad western lowland and the steep ridges immediately to the east.
Silver Creek and Allen Creek descend from the higher interior toward the Soldier River side. Their valleys are short but sharply defined on the shaded terrain. The elevation map shows why: the creeks cross a large height difference over a relatively short distance, cutting narrow green corridors into brown and tan ridges before reaching lower ground.
This sheet is intended for geographic reference rather than flood forecasting, current water levels, navigation, parcel boundaries, or legal water limits. Its main value is showing how streams connect the hill valleys with the western lowlands. Current hydrologic or regulatory information should be checked with the responsible agency.
Boyer River and Willow Creek cut long corridors through the central hills
Boyer River is the dominant central waterway. It follows a long low corridor through the hill country and provides a useful geographic link between the Logan and Woodbine parts of the county. Willow Creek runs through another long north-south depression farther west before joining the lower terrain. Both waterways are easy to match with green valleys on the elevation map.
Mud Creek and Picayune Creek appear in the northeast, while Skunkie Creek is labeled east of the Boyer River corridor. Robin Creek and Pigeon Creek occupy the southeastern extension. These streams are smaller than Boyer River, but their narrow valleys divide the high ground into many short ridges and give the eastern half of Harrison County its strongly textured appearance.
Logan is the best town reference for the central network of Boyer River and Willow Creek valleys. Woodbine helps locate the upper Boyer corridor, while Persia is useful for the southeastern creek country. Pairing each waterway with a nearby town is much easier than trying to memorize a long list of creek names without geographic context.
Elevation rises from 300-meter lowlands to 441-meter ridges
The supplied elevation map shows an actual county range of about 300 to 441 meters, with a mean elevation of 354 meters. The broadest low terrain is the dark-green western plain. Immediately to the east, the land rises sharply into brown and orange ridges. Central, northern, and eastern Harrison County contain repeated high ridges separated by the lower valleys of Boyer River and numerous creeks.
The abrupt edge between the western lowland and the interior hills is the strongest relief feature on the map. The ridge country is not one continuous high surface; it is carved into narrow fingers by many tributaries. Farther east and southeast, the same ridge-and-valley pattern continues around Boyer River, Mud Creek, Pigeon Creek, and related drainage lines.
The elevation colors are designed for broad terrain comparison rather than survey-grade measurement. Exact parcel elevation, road grade, engineering design, or construction work requires original elevation data or professional surveying. For general map reading, the key feature is the sharp rise from the western lowlands into the dissected central and eastern ridge country.
The western plain and interior hills create different road patterns
Harrison County’s western roads are generally straighter and more widely spaced because they cross broad low ground. Around Logan and Woodbine, the terrain becomes much more broken, and roads frequently change direction as they cross valleys or follow the spaces between ridges. Comparing the general map with the elevation map makes that difference much easier to understand.
Missouri Valley and Mondamin are the best references for the western lowland. Logan and Woodbine represent the central and northeastern hill country, Dunlap helps locate the northeastern end of the U.S. 30 corridor, and Persia anchors the southeastern ridges. Using a different landmark for each terrain zone makes it easier to move between the county, city, water, and elevation sheets.
Choose the Harrison County map that fits the task
Use the general county map when you need towns and numbered roads in one view. It is the quickest way to compare Missouri Valley, Logan, Woodbine, Dunlap, Mondamin, and Persia with I-29, U.S. 30, Iowa 44, Iowa 127, Iowa 183, and Iowa 191. The city map is cleaner when the goal is simply to compare the six highlighted communities and their ranking.
The terrain-and-water map is best for Little Sioux River, Soldier River, Boyer River, Willow Creek, Mud Creek, Pigeon Creek, and the other named tributaries. The elevation map adds the 300–441 m range and makes the broad western lowland and high central-eastern ridges immediately visible. Starting with one map for orientation and then using another for terrain or water detail is usually the easiest approach.
The WebP images in the article are optimized for quick browser viewing. For printing, classroom use, presentations, or closer comparison, the ZIP below contains the county, major-city, terrain-and-water, and elevation maps as high-resolution JPG files. They are general-reference graphics and do not replace legal boundary records, current transportation data, flood information, or precise survey measurements.
Frequently Asked Questions
Which map is best for locating Missouri Valley and Logan?
The general county map is the best starting point. Missouri Valley lies in the southwestern lowlands near I-29, while Logan is farther northeast in the central hill country. Woodbine, Dunlap, Mondamin, and Persia are also labeled on the same sheet.
Where is the strongest terrain contrast in Harrison County?
The elevation map shows the strongest contrast along the western edge of the hill country, where broad dark-green lowlands rise abruptly into brown and orange ridges. The mapped range is about 300 to 441 meters, with a mean elevation of 354 meters.
How can Boyer River and Soldier River be distinguished on the map?
Soldier River is in the northwest near the transition from lowland to hills, while Boyer River follows a much longer central valley through the interior. Logan and Woodbine are useful town references for the Boyer River corridor.
Map File Information
The ZIP contains four high-resolution JPG maps for Harrison County, Iowa: county, major cities, terrain and water, and elevation.
- Included Files: Use only the versions confirmed in the article and supplied images
- File Type: Use the confirmed download contents
- Intended Use: Printing, education, presentations, and map-based projects
Related Maps
Sources and reference data
The links below provide authoritative U.S. government source data for county boundaries, hydrography, and elevation represented in the supplied map set.
These maps are intended for general geographic reference, learning, printing, and visual comparison. Legal boundaries, ownership, current road conditions, flood risk, water levels, and precise elevations should be checked against the responsible agency’s current records.
Green Map creates custom-edited map images using open geographic data sources such as geoBoundaries, Natural Earth, OpenStreetMap, and government open data.
These maps are edited visual materials, not raw data files, and are provided for education, documents, presentations, and graphic reference.
