Napa County is easiest to understand as two contrasting landscapes within one long north-south county. The settled Napa Valley occupies the western side, where American Canyon and Napa lead north toward Yountville, St. Helena, and Calistoga along SR 29. Farther east, the road network thins out and the terrain becomes more rugged around Lake Berryessa, Putah Creek, and a web of smaller streams. The supplied maps make that valley-versus-eastern-highlands contrast clear without requiring a separate technical GIS layer.
This page includes a county overview for communities, roads, and boundaries; a city index that ranks five places and shows direct distances from Napa; and a terrain-and-water map focused on rivers, creeks, lakes, reservoirs, and shaded relief. High-resolution JPG versions corresponding to those three maps are available together in the download ZIP below. The WebP images are convenient for on-page viewing, while the larger JPG files are better for printing, class materials, reports, or presentation slides.
The county’s official water resources material also describes two major settings that match the supplied water map: the Napa River watershed through the main valley and the Putah Creek–Lake Berryessa watershed to the east. On the map, Napa River follows the southern valley, while Putah Creek, Pope Creek, and Eticuera Creek organize much of the eastern drainage around Lake Berryessa. That division provides a useful framework for reading the roads, communities, and terrain shown in the rest of the article.
Table of Contents
SR 29 ties the settled Napa Valley together from American Canyon to Calistoga
On the county overview, the most obvious human-geography feature is the chain of communities along the western valley. Napa lies in the south-central part of the county, American Canyon is farther south, and the corridor continues north through Yountville, Oakville, Rutherford, St. Helena, Deer Park, and Calistoga. Angwin appears east of the main valley near St. Helena. The place labels are not spread evenly across the county; they form a long concentration on the Napa Valley side while the broad eastern half contains far fewer settlement labels.
SR 29 provides the simplest road reference for this settled corridor. It runs north through Napa Valley toward St. Helena and Calistoga, keeping many of the best-known communities close to one continuous route. SR 128 turns east from the St. Helena area toward the interior hills, while SR 121 appears around Napa and the southeastern part of the county. SR 12 crosses near Napa, and I-80 is visible along the far southern edge near American Canyon. These roads help separate north-south movement within the valley from routes that cross the surrounding hills.
The east side of the county looks markedly different. Moskowite Corner is labeled near the southwestern side of Lake Berryessa, but the map otherwise shows fewer communities and a much lighter road network than in Napa Valley. Creeks are more visually prominent there, and the county outline expands over a large mountainous interior. For general orientation, this contrast is as important as any single road: the western valley concentrates most of the named settlements on the map, while the eastern side is dominated by rugged terrain and water features.
The city index compares Napa with four smaller places and shows direct distance
The city map strips away much of the smaller-place labeling and highlights five ranked locations. Napa is ranked first and marked as the hub, followed by American Canyon, St. Helena, Calistoga, and Yountville. The population values printed on this supplied map are 78,239 for Napa, 21,691 for American Canyon, 5,318 for St. Helena, 5,111 for Calistoga, and 3,348 for Yountville. These are map-display values rather than a substitute for a current population estimate, but they explain why Napa is emphasized so strongly in the city view.
The map also prints direct distances from Napa: about 7 miles to American Canyon, 8 miles to Yountville, 18 miles to St. Helena, and 26 miles to Calistoga. These are straight-line distances, not road mileage. A drive on SR 29 or another route will be longer or shorter depending on the actual starting point, road curvature, detours, and traffic. The values are best used to compare relative spacing, while navigation software should be used for a real trip.
The pattern becomes especially clear when the distance labels are read from south to north. American Canyon is close to Napa on the southern end of the county, Yountville is just to the north, and St. Helena and Calistoga are progressively farther up the valley. The city map therefore works well when a reader only needs the hierarchy and spacing of the main places. For Oakville, Rutherford, Deer Park, Angwin, or Moskowite Corner, the more detailed county overview is the better reference.
Napa River defines the valley while Lake Berryessa anchors the eastern watershed
The terrain-and-water map shifts attention away from roads and toward drainage. Napa River runs through the southern valley and is joined by a network of smaller creeks. Dry Creek enters from the western side, while Conn Creek is prominent farther north and east. Lake Hennessey sits on the Conn Creek system, and Rector Creek Reservoir and Milliken Reservoir appear farther south. This cluster of river, tributaries, and reservoirs belongs to the Napa Valley side of the county.
Lake Berryessa dominates the eastern half of the water map. Putah Creek enters the lake system and continues from its southeastern side, while Pope Creek approaches from the west and Eticuera Creek is labeled in the north. Numerous unnamed tributaries spread across the shaded hills and converge on the lake. The result looks very different from the linear Napa River corridor: Lake Berryessa is a large reservoir surrounded by mountain drainage rather than a river running down the floor of the main settled valley.
This map is useful for general watershed context, but it is not a flood-hazard map, parcel map, legal water-right map, or navigation chart. A stream shown near a road or community does not by itself establish flood risk or a property boundary. Readers who need those answers should use the most current Napa County, state, or federal source designed for that specific purpose.
Lake Hennessey, smaller reservoirs, and shaded relief add detail between the two major watersheds
Several smaller named water bodies help fill in the landscape between Napa River and Lake Berryessa. Lake Hennessey is clearly labeled east of the main valley, with Rector Creek Reservoir and Milliken Reservoir farther south. Lake Curry appears closer to the southeastern boundary, while Deer Lake and Henne Lake are shown in the western and northwestern hills. These features make the county water picture more complex than a simple two-waterbody comparison.
The relief background gives a broad visual sense of why the water features are distributed this way. The Napa Valley floor appears wider and smoother than the ridges along both sides, while the Lake Berryessa region is surrounded by a denser pattern of hills and valleys. Pope Creek, Putah Creek, and smaller tributaries follow those low routes through the mountains. The shading is helpful for distinguishing rougher ground from broader valley surfaces, but it does not provide survey-grade elevation values.
No separate elevation map is supplied in this package. Readers should therefore avoid treating the relief image as a measured height layer or using it to calculate slopes for engineering, construction, surveying, or site design. For exact terrain heights, an authoritative elevation dataset such as the USGS 3D Elevation Program is the appropriate source. On this page, the relief simply helps connect the road and water patterns to the county’s mountainous setting.
Choose the overview for roads, the city index for spacing, and the water map for drainage
The county overview is the best starting point when you need several types of information at once. It shows Napa, Yountville, St. Helena, Calistoga, smaller communities, the county line, and major routes including SR 29, SR 128, SR 121, and SR 12. That makes it useful for a class handout, travel orientation, a regional report, or any document that needs both place names and road context without the detail of a street map.
The city index is cleaner when the goal is to compare the main places. Its strongest feature is not road detail but the combination of rank, the hub at Napa, and direct distances to American Canyon, Yountville, St. Helena, and Calistoga. The terrain-and-water map is the better choice for Napa River, Lake Berryessa, Putah Creek, Lake Hennessey, reservoirs, and the surrounding hills. Using the maps for these distinct tasks keeps the page easy to read and avoids forcing one image to answer every geographic question.
For screen viewing, the WebP previews are usually sufficient. For printing, zooming into labels, or inserting the maps into a large slide, use the high-resolution JPG files in the ZIP. These are general-reference maps, so live traffic, legal boundaries, parcel ownership, flood determinations, exact elevation, and engineering measurements should always be checked against the appropriate current official records.
Frequently Asked Questions
What is the easiest road to use as a reference between Napa and Calistoga?
SR 29 is the clearest north-south reference on the county overview. From the Napa area it continues through the Napa Valley past Yountville, Oakville, Rutherford, and St. Helena toward Calistoga. Use current navigation for an actual trip because the map is a regional overview rather than a live road-routing product.
Are the 7, 8, 18, and 26 mile labels on the city map driving distances?
No. The city map identifies them as direct distances from the Napa hub: about 7 miles to American Canyon, 8 miles to Yountville, 18 miles to St. Helena, and 26 miles to Calistoga. They are straight-line values and should not be used as road mileage or travel-time estimates.
How do Napa River and Lake Berryessa differ on the water map?
Napa River follows the main western valley and is associated with tributaries and reservoirs such as Conn Creek and Lake Hennessey. Lake Berryessa lies in the eastern mountains and is organized around the Putah Creek system, with Pope Creek and Eticuera Creek also labeled. The map therefore shows two distinctly different drainage settings within one county.
Map File Information
The ZIP archive contains high-resolution JPG versions of the Napa County overview map, ranked city map, and terrain-and-water map.
- Included Files: 3 high-resolution JPG maps
Related Maps
Sources and reference links
- Napa County GIS Hub: official county open-data portal for boundaries, environmental layers, planning information, and other local geographic data.
- Napa County Flood & Water Resources: official county information on the Napa River, watershed programs, flood projects, and water resources.
- U.S. Census Bureau TIGER/Line Shapefiles: authoritative geographic files for county boundaries, roads, and mapped places.
- USGS National Hydrography: official reference data for rivers, streams, lakes, reservoirs, and other hydrographic features.
- USGS 3D Elevation Program: authoritative elevation data for work that requires measured terrain heights rather than generalized shaded relief.
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.
