Poweshiek County in east-central Iowa includes Grinnell, Brooklyn, Montezuma, Malcom, Deep River, Hartwick, and a large rural area crossed by I-80 and U.S. 6. U.S. 63, Iowa 21, Iowa 85, and Iowa 146 provide additional references through the southern and eastern parts of the county. The supplied maps also show Big Bear Creek, the English River system, several named lakes, and a clear west-to-east elevation contrast. High-resolution JPG versions of the county, city, terrain-and-water, and elevation maps are available in the ZIP near the end of the page. High-resolution map files are available for download in the section below.
The western and northwestern parts of the county are generally higher, while lower green terrain follows Big Bear Creek, North English River, Deep River, and other valleys toward the east. Holiday Lake, Lake Ponderosa, Diamond Lake, and Lake Arbor add useful water references in a county where many smaller tributaries divide the uplands.
Table of Contents
Grinnell and Brooklyn frame the northern road corridor
Grinnell is the clearest first landmark on the general county map. U.S. 6 passes through the Grinnell area and continues east toward Brooklyn, with Victor shown near the eastern edge as a nearby reference. I-80 crosses the county farther south and provides the main east-west route through the central interior.
Malcom lies close to the center between the Grinnell and Brooklyn sides, while Montezuma anchors the southern interior. U.S. 63 provides a north-south reference near Montezuma, Iowa 21 follows the eastern side, Iowa 85 runs east from the Montezuma area, and Iowa 146 helps locate the southwestern corner near Searsboro.
Hartwick and Holiday Lake help locate the quieter northeastern countryside beyond the main highway corridors. The road map looks relatively simple, but the dense stream network on the terrain sheet shows that the land between towns is much more deeply cut by small valleys than the road pattern alone suggests.
Grinnell is the largest of the six highlighted cities
The city map ranks Grinnell first with a mapped population of 9,505. Brooklyn is second at 1,459 and Montezuma third at 1,410. Deep River is fourth at 335, Malcom fifth at 221, and Hartwick sixth at 114.
Grinnell provides a western reference, Brooklyn the northeast, and Montezuma the south-central interior. Malcom lies close to the county center, Deep River marks the southeast, and Hartwick provides a small northeastern reference. Their spacing helps break a broad rural county into several practical areas for map reading.
Neighboring labels include Tama, Iowa, Marshall, Benton, Jasper, Keokuk, and Mahaska counties. Comparing the city and elevation maps also reveals a broad terrain difference: the Grinnell side is generally higher, while several eastern valleys near Brooklyn and Deep River sit lower.
Big Bear Creek and Walnut Creek organize the northern drainage
Walnut Creek runs across the northern part of the terrain map and passes near Holiday Lake. Big Bear Creek follows a separate east-west valley farther south, with many small tributaries cutting into the uplands on both sides. These waterways are among the clearest natural references in the northern half of the county.
Lake Arbor appears in the northwest, while Holiday Lake provides a distinct water reference farther east. On the elevation sheet, the Big Bear Creek valley forms a long lower corridor extending from higher western ground toward the lower eastern side, which makes the surrounding ridges easy to distinguish.
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 the larger creeks, rivers, and lakes fit into the county’s hills and valleys.
English River branches and Deep River divide the southern half
North English River crosses the south-central part of the county in a long valley. Little Bear Creek and Dugout Creek lie farther north, creating additional low corridors between the central uplands. The North English River valley is one of the clearest terrain features around the Montezuma side.
Deep River forms another eastward-flowing corridor in the southeast, while South English River runs farther south. North Skunk River, Sugar Creek, and English Creek appear near the southwestern edge. Lake Ponderosa and Diamond Lake provide two useful water references west of Montezuma.
The contrast between Big Bear Creek in the north and the English River system in the south shows that drainage is spread across several separate valleys. Those waterways cut the higher western terrain into ridges and generally lead toward lower ground in the eastern half of the county.
Elevation ranges from 231 to 315 meters
The supplied elevation map shows an actual county range of about 231 to 315 meters, with a mean elevation of 278 meters. The highest brown terrain is concentrated across much of the west and northwest, with additional ridges extending through the central interior. Lower green terrain is much more common in the east and northeast.
Big Bear Creek and North English River form long lower corridors, while Deep River creates another low route across the southeast. North Skunk River also occupies lower ground near the southwest. The mapped relief is about 84 meters, enough to make the ridge-and-valley pattern clear at county scale.
The elevation colors are intended 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.
Grinnell to Montezuma crosses ridges and English River valleys
Grinnell provides a useful western reference because it lies close to the county’s higher terrain and the U.S. 6 and I-80 corridors. Moving south toward Montezuma crosses a dense network of small tributaries before approaching the North English River system, where lower ground becomes more prominent.
Brooklyn is useful for the Big Bear Creek and eastern lowland side, while Deep River anchors the southeastern valleys. Malcom gives a central reference between the major towns, and Hartwick helps locate the northeastern countryside. Matching those places across the county, water, and elevation maps makes the terrain changes easier to follow.
Choose the Poweshiek County map that fits the task
Use the general county map when you need towns and major routes in one view. It is the quickest way to compare Grinnell, Brooklyn, Malcom, Montezuma, I-80, U.S. 6, U.S. 63, Iowa 21, Iowa 85, and Iowa 146. The city map is better when the goal is to compare the six highlighted communities and their mapped population ranking.
The terrain-and-water map is best for Walnut Creek, Big Bear Creek, Little Bear Creek, North English River, Deep River, South English River, North Skunk River, Holiday Lake, Lake Ponderosa, Diamond Lake, and Lake Arbor. The elevation map adds the 231–315 m range and makes the higher western uplands and lower eastern valleys easy to compare.
The WebP images in the article are optimized for quick browser viewing. For printing, classroom use, presentations, or closer regional 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 comparing Grinnell and Montezuma?
The general county map is the best starting point. Grinnell lies in the western part of the county and Montezuma in the south-central interior. I-80, U.S. 6, U.S. 63, Iowa 146, and Iowa 85 provide useful road references between the two areas.
Where are Holiday Lake and Diamond Lake on the supplied maps?
The terrain-and-water map shows them most clearly. Holiday Lake lies in the northern part of the county near Walnut Creek, while Diamond Lake appears west of Montezuma close to Lake Ponderosa. Their different positions make them useful reference points for the northern and southern halves.
What does the 231–315 m elevation range show?
Higher ground is concentrated across much of the west and northwest, while lower terrain follows eastern valleys and major waterways. The mapped mean elevation is 278 meters. Precise site elevations require original elevation data or professional survey information.
Map File Information
The ZIP contains four high-resolution JPG maps for Poweshiek 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
Poweshiek County’s official website and Iowa DOT county map page provide county-specific references, while the federal links below support boundary, hydrography, and elevation data.
- Poweshiek County, Iowa – County Government
- Iowa DOT – Poweshiek County Maps
- U.S. Census Bureau TIGER/Line Shapefiles
- USGS National Hydrography
- USGS 3D Elevation Program
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.
