Use this web map to link to other geospatial datasets available through county and city sites (Not comprehensive). May need to zoom in to see the participating cities. The county boundaries and city points were published by Washington State agencies and downloaded from geo.wa.gov. Locations are approximate, and no warranties are made regarding this data. The canvas basemap has been compiled by Esri and the ArcGIS user community from a variety of best available sources. Want to have your data site listed? Contact the Geospatial Program Office.

In 2007, Washington State legislators requested a trails database, but funding to complete that statewide project was not made available at the time.

In 2009, the Federal Government outlined the need for trails database schema in their Data Standards Review Committee, stressing the efficiency in management decisions that a streamlined database can provide.

“The collection, storage and management of trail related data are important components of everyday business activities in many federal and state land-managing agencies, trail organizations and businesses. From a management perspective, trails data must often mesh closely with other types of infrastructure, resource and facility enterprise data.”

In 2014, the Washington State Office of the Chief Information Officer's (OCIO) Geospatial Program Office acquired a Nonhighway and Off-Road Vehicle Activities (NOVA) Program grant through the Washington State Recreation and Conservation Office (RCO) giving the OCIO initial funding to develop a statewide trails database based on Federal Geographic Data Committee standards. Using the same standard for all trails data will allow land managers and recreational users throughout the state to access and use the data regardless of administrative boundary.

"Data standards will make it easier for trail information to be accessed and exchanged and used by more than one individual agency or group…Ease in sharing data increases the capability for enhanced and consistent mapping, inventory, monitoring, conditions assessment, maintenance, costing, budgeting, information retrieval, and summary reporting for internal and external needs.”

Along with streamlining data and facilitating efficiency in management practices across agencies, the database will provide a source of trails information that is open and free to the public.The 2016 State Legislature provided additional funding from the Nonhighway and Off-road Vehicle Activities Account to the Office of the Chief Information Officer to continue work on the database.

Additional details about the project can be found here:

Washington State Trails Map

Please note that this map and its component services have been designed to work together as part of the web application.

This is a derived voter registration dataset by county, designed for use with the Office of Public Defense web application.

This was created using the Feature Outline Mask tool in ArcGIS 10.2.2. The feature outline mask was applied to the State of WA boundary layer and a tolerance of 5 points was used. Then a polygon was created which is the extent of the world. Finally, the mask was used to cut a hole in the world extent polygon. This is the result you will see in this layer.

This imagery service is for viewing only, no downloading of the raster images available.

Displays surface geology at all scales. This data is maintained by Washington State Department of Natural Resources. In this data there is information about the geologic unit label, geologic age, lithology, and unit description. To download geology data or other geologic hazard us the Geology GIS Data and Databases page here. The Washington Geologic Information Portal puts complex geologic and hazards information into the hands of everyone, including you. This application allows you to quickly compare and synthesize data of different types to help solve a variety of problems. Enter the Washington Geology Portal here to view more geologic spatial information or visit the home site here.

Unincorporated Urban Growth Areas (UGA) as defined by the Growth Management Act (GMA). The annual update is conducted by collecting UGA polygons directly from each of Washington's 39 counties. As of 2025, there are 27 counties with UGAs.All UGA polygons are normalized against the Department of Revenue's (DOR) "City Boundaries" layer (shared to the Washington Geoportal a.k.a. the GIS Open Data site: geo.wa.gov). The City Boundaries layer was processed into this UGA layer such that any overlapping area of UGA polygons (from authoritative individual counties) was erased. Since DOR polygons and county-sourced UGA polygons do not have perfect topology, many slivers resulted after the erase operation. These are attempted to be irradicated by these processing steps. "Multipart To Singlepart" Esri tool; exploded all polygons to be individualSlivers were mathematically identified using a 4 acre area threshold and a 0.3 "thinness ratio" threshold as described by Esri's "Polygon Sliver" tool. These slivers are merged into the neighboring features using Esri's "Eliminate" tool.Polygons that are less than 5,000 sq. ft. and not part of a DOR city (CITY_NM = Null) were also merged via the "Eliminate" tool. (many very small slivers were manually found yet mathematically did not meet the thinness ratio threshold)The final 8 polygons less than 25 sq. ft. were manually deleted (also slivers but were not lined up against another feature and missed by the "Eliminate" tool runs)Dissolved all features back to multipart using all fieldsAll UGAs polygons remaining are unincorporated areas beyond the city limits. Any polygon with CITY_NM populated originated from the DOR "City Boundaries" layer. The DOR's City Boundaries are updated quarterly by DOR. For the purposes of this UGA layer, the city boundaries was downloaded one time (4/24/2025) and will not be updated quarterly. Therefore, if precise city limits are required by any user of UGA boundaries, please refer to the city boundaries layer and conduct any geoprocessing needed. The DOR's "City Boundaries" layer is available here:https://www.arcgis.com/home/item.html?id=69fcb668dc8d49ea8010b6e33e42a13aData is updated in conjunction with the annual statewide parcel layer update. Latest update completed April 2025.

DATA LINKED FROM WA DNR OPEN DATA PORTALSee the metadata and original layer hereThe Washington Geological Survey’s simplified volcanic hazards database is adapted from a U.S. Geological Survey compilation of volcanic hazards for the five stratovolcanoes in Washington State (Mount St. Helens, Mount Adams, Mount Rainier, Mount Baker, and Glacier Peak). The features were generated by digitizing the volcanic hazard areas from simplified hazard maps produced by the USGS. The database contains feature classes showing the modeled extent of lahars, near-volcano hazards, regional lava flows, sediment, and tephra (ash) that might affect Washington following a volcanic eruption. Note that lahars can occur even when a volcano is not erupting. The original hazard maps are available on the USGS website (https://volcanoes.usgs.gov/vsc/multimedia/cvo_hazards_maps_gallery.html)

A bug has been logged for the 403 error which is generated when trying to download large datasets through the Download menu. As a workaround, the zipped file geodatabase is available here:https://www.arcgis.com/sharing/rest/content/items/d04a50e44fbd4497bb57830b52fe5a2b/dataThe Washington State Land Use coverage was produced from digital county tax parcel layers using Department of Revenue (DOR) two digit land use codes (see; WAC 458-53-030, Stratification of assessment rolls - real property). Land use attribute data has been normalized for all county parcel data to conform to the two digit DOR codes. All county parcel layers are dissolved using the normalized land use code. No county parcel information remains in this data other that what geometry remains from the dissolve process.

This data shows the approximate area of 6 inch coverage for the statewide imagery consortium project. If you are a governmental organization or non-profit and would like to join, please contact Joanne Markert @ 360.407.8691 or joanne.markert@ocio.wa.gov.

This imagery service is for viewing only, no downloading of the raster images available.

Water Resource Inventory Areas (WRIA) for Washington State at 1:24,000 scale. WRIAs were formalized under WAC 173-500-040 and authorized under the Water Resources Act of 1971, RCW 90.54. Ecology was given the responsibility for the development and management of these administrative and planning boundaries. These boundaries represent the administrative under pinning of this agency's business activities. The original WRIA boundary agreements and judgments were reached jointly by Washington's natural resource agencies (Ecology, Natural Resources, Fish and Wildlife) in 1970.

This imagery service is for viewing only, no downloading of the raster images available.

This imagery service is for viewing only, no downloading of the raster images available.

WA Public Safety Answering Points (PSAP) Boundaries. This data was updated with Nov 2018 version. Attributes have changed. Please update your links as needed. contact Joanne Markert, State GIS Coordinator, 360.407.8691 with any questions or concerns.

The trailhead database was created in conjunction with the Washington State Trails Database project. The attributes included in this database were chosen to supplement information found in the trails database, so using the two together is recommended. This project did not create new georeferenced locations; the aim was to design a geodatabase, include as many existing trailheads as possible, and answer common questions regarding use and availability. It is not comprehensive.

Additional details about the project can be found here:

http://www.rco.wa.gov/recreation/WashingtonStateTrailsMap.shtml

Please note that this service has been designed to supplement other services in the map and web application.

The Salmon Recovery Portal is a comprehensive, online database found at https://srp.rco.wa.gov. It displays information on salmon recovery actions and goals. Tracking more than 12,000 on-the-ground projects across the state, the Salmon Recovery Portal makes it easy to see how projects relate to each other, what needs to be done next for salmon, and how progress is being made to address the problems harming salmon. The Salmon Recovery Portal allows those doing salmon recovery to track and prioritize salmon recovery projects, making it easier to see the big picture.The full feature service is available here: https://gismanager.rco.wa.gov/arcgis/rest/services/Public_SRP_Primary_Worksites/MapServer/0

Washington State County Boundaries including Department of Natural Resources (DNR) county codes. This data is created from the WA Public Land Survey source data maintained by the DNR.WA County Boundaries Metadata

This imagery service is for viewing only, no downloading of the raster images available.

Washington state county boundaries.