Monona County in western Iowa has one of the strongest terrain contrasts visible in this county map set: broad low ground around Onawa, Whiting, and Blencoe on the west, and tightly dissected ridges around Mapleton, Ute, Soldier, and Moorhead farther east. U.S. 29 runs north-south through the western side, Iowa 175 connects the Onawa area with the interior, and Iowa 37, 141, and 183 help locate communities across the hill country. The terrain-and-water map adds Little Sioux River, Maple River, Soldier River, several drainage ditches, and small lakes. 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 orient the county is to begin with Onawa and U.S. 29. Whiting lies farther northwest, Blencoe southwest, Mapleton northeast, Ute east, and Moorhead southeast. On the elevation sheet, the western side is a broad dark-green lowland, while the eastern half rises into dense brown ridges separated by green river valleys. Comparing the road and elevation maps makes the county’s west-to-east terrain change immediately visible.
Table of Contents
Onawa and U.S. 29 anchor the broad western lowland
Onawa is the strongest first landmark on the general county map. U.S. 29 passes north-south through the western side, and Iowa 175 connects the Onawa area with the interior road network. Whiting provides a northern western reference, while Blencoe marks the southern part of the same low-lying side of the county.
Farther east, Turin and Castana sit near the transition into much rougher terrain. Mapleton anchors the northeast, Ute the east, and Soldier with Moorhead the southeast. Iowa 37 crosses the central interior, while Iowa 141 and Iowa 183 help locate the Ute side. The map is intended for county-scale orientation rather than live navigation, so current road work and closures should be checked separately.
The road pattern changes with the terrain. Western routes cross a broad, comparatively flat surface, while roads around Castana, Mapleton, Ute, and Moorhead follow a landscape cut by many valleys. Matching the same places on the elevation map shows why the eastern road network has a more irregular pattern.
Onawa leads a six-city pattern split between lowland and hill country
The city map ranks Onawa first with a mapped population of 2,839 and Mapleton second at 988. Whiting is third at 777, Ute fourth at 351, Blencoe fifth at 280, and Moorhead sixth at 195. The largest highlighted city is in the western lowland, while the second-largest lies in the northeastern hill country, so the ranking also spans two very different terrain settings.
Whiting and Blencoe provide northern and southern references on the western side. Ute marks the east, Moorhead the southeast, and Mapleton the northeast. Neighboring counties shown around the city map include Woodbury to the north, Harrison to the west, and Crawford and Ida to the east, placing Monona County along the western side of Iowa.
The city distribution becomes more informative when compared with relief. Onawa, Whiting, and Blencoe sit close to extensive low ground, while Mapleton, Ute, and Moorhead are surrounded by repeated ridges and valleys. This contrast is one of the clearest county-specific features in the supplied map set.
Ditches and small lakes mark the western lowland
The western half of the terrain-and-water map has a very different appearance from the hill country to the east. W Fork Little Sioux River runs through the north-central lowland, and McCandless Intercounty Ditch extends through the flatter western side. Farther south, Monona Harrison Ditch and McNeill Ditch form additional long drainage lines across the low terrain.
Badger Lake is labeled in the northwest, while Blue Lake and Guard Lake appear farther south. These water bodies provide useful fixed references around the Onawa, Whiting, and Blencoe side of the county. When the water and elevation maps are compared, the ditches and lakes line up with the broad dark-green lowland that dominates the western half.
This sheet is intended for geographic reference rather than flood forecasting, drainage-capacity analysis, current water levels, navigation, parcel boundaries, or legal water limits. Its main value is showing how the broad western lowland differs from the river-cut hills farther east.
Little Sioux, Maple, and Soldier rivers carve the eastern ridges
The terrain changes sharply east of the western lowland. Little Sioux River follows a long valley through the central-northern interior, cutting between steep ridges. Maple River crosses the northeastern and central-eastern hills, creating another strong green corridor that is easy to match with the elevation sheet.
Soldier River and E Soldier River divide the southeastern uplands, while N Jordan Creek cuts another narrow valley between them. Beaver Creek forms a lower route through the south-central hills. The density of named streams and short tributaries explains why the eastern half looks so strongly dissected compared with the broad western plain.
Moorhead and Soldier are useful town references for the southeastern drainage, Ute for the eastern Soldier River side, and Mapleton for the Maple River hill country. Using the towns and river names together makes it much easier to move between the road, water, and elevation maps.
Elevation ranges from 310 to 447 meters
The supplied elevation map shows an actual county range of about 310 to 447 meters, with a mean elevation of 353 meters. Most of the western half appears as continuous dark-green low terrain, while the central transition rises quickly into brown and tan ridges. The eastern half contains dense high ground separated by narrow green river valleys.
Higher ridges are especially widespread in the northeast, east, and southeast. Little Sioux River, Maple River, Soldier River, and their tributaries cut long lower corridors through those uplands. With more than 130 meters between the mapped low and high ends, the county-scale contrast is unusually easy to see on this elevation sheet.
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 abrupt transition from the western lowland into the deeply cut eastern uplands.
The route from Onawa toward Mapleton and Ute crosses several terrain zones
Around Onawa and Whiting, towns and roads occupy a wide low surface with relatively little relief. Moving east through the Turin-Castana area brings a rapid increase in slopes and short ridges. Farther toward Mapleton and Ute, the landscape is organized around the Maple River and Soldier River systems, with narrow valleys separated by high ground.
Turin is a useful reference near the lowland-to-hill transition. Mapleton helps locate the northeastern Maple River corridor, Ute the eastern drainage, and Moorhead the deeply cut southeastern terrain. Comparing these places across all four supplied maps reveals much more detail than treating the county as a simple west-to-east slope.
Choose the Monona 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 Onawa, Whiting, Blencoe, Turin, Castana, Mapleton, Ute, Soldier, and Moorhead with U.S. 29, Iowa 175, Iowa 37, Iowa 141, and Iowa 183. The city map is better when the goal is to compare Onawa, Mapleton, Whiting, Ute, Blencoe, and Moorhead using the population ranking shown on the supplied graphic.
The terrain-and-water map is best for comparing the western ditches and lakes with Little Sioux River, Maple River, Soldier River, E Soldier River, N Jordan Creek, and Beaver Creek. Badger Lake, Blue Lake, and Guard Lake provide additional western references. The elevation map adds the 310–447 m range and makes the contrast between the broad western lowland and the eastern ridges immediately visible.
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
Why do Onawa and Mapleton have such different terrain around them?
Onawa is close to the broad western lowland, while Mapleton lies in the northeastern ridge-and-valley country around the Maple River system. The elevation map shows Onawa’s side as broad dark-green low terrain and Mapleton’s side as repeated brown ridges cut by green valleys.
Which map is best for comparing the western ditches with the eastern rivers?
The terrain-and-water map is the best choice. It shows McCandless Intercounty Ditch, Monona Harrison Ditch, McNeill Ditch, Badger Lake, Blue Lake, and Guard Lake on the western side, together with Little Sioux River, Maple River, and Soldier River farther east.
What does the 310–447 m elevation range show?
The elevation map shows an actual range of about 310–447 meters with a mean of 353 meters. The western half is broadly low and flat, while the eastern half contains high ridges and narrow river valleys. Precise site elevations require original elevation data or professional survey information.
Map File Information
The ZIP contains four high-resolution JPG maps for Monona 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.
