Blog · October 14, 2026 · Idaho
The Valley County Plat Book and the online parcel map
For land near Smiths Ferry, plat books show ownership by township; the parcel viewer shows it today.
Main page: Valley County, ID GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Want a copy of the Valley County plat book? It's a printed atlas of landownership, usually by township, useful for farms near Payette National Forest. In this Valley County guide: how the atlas is organized, where to look for printed copies, and how the county viewer fills the gaps.
Getting started with the Valley County plat book
If you're looking near Donnelly, plat books are commercial atlases, that map ownership across the countryside, usually township by township.
The free map to start with
Your first stop is the Idaho statewide Parcels layer in ArcGIS Map Viewer; it maps every tax parcel from Salmon-Challis National Forest to McCall. If the land is near Payette National Forest, type a street address, an owner's name or a parcel number, then pick the result to center the map on it. If the land is near Cascade, save the parcel ID while you have it open; every clerk in the county asks for it first.
Land on the county line
Valley County meets Adams County, Boise County, Custer County, Gem County, and Idaho County, all with their own assessor records. A tract near the line by Smiths Ferry may be split in two county records, so open the neighboring map too. If you're looking near Smiths Ferry, our state page lists every neighboring county map across Idaho.
Why people still buy them
Buyers and seed dealers around Payette National Forest rely on them for a big-picture view of who owns what.
How land is described here
Idaho is laid out under the Public Land Survey System, so rural legal descriptions near Payette National Forest cite section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though sections near Payette National Forest can be irregular. Keep the legal description for land near Yellow Pine when you talk to a surveyor.
Before you lean on the lines
Parcel lines are drawn for taxes, not surveyed, so the edge of a yard near Payette National Forest can sit some distance off the line on screen. For a parcel near Donnelly, owner names and values update on a schedule, so a deed recorded last month can take weeks to appear.
Finding a printed edition
Not every county has a current edition, so ask at the courthouse, extension office or a local library near Boise National Forest.
The free online alternative
Between printed editions, the Idaho statewide Parcels layer in ArcGIS Map Viewer shows current owners, for tracts near McCall.
A quick look at the area
Cascade is the county seat, where most land records are kept. You'll also find Donnelly, McCall, Smiths Ferry, and Yellow Pine, where town lots give way to larger tracts. Around 12,644 people live in Valley County (Census estimate, 2023) spread over some 3,665 square miles. Valley County dates to 1917, which matters when you trace an old farm's title. Features like Boise National Forest help you orient on the aerial.
Deeds, plats and who keeps them
The map is an index, not the title: deeds, subdivision plats and easements for land near Payette National Forest sit with the County Recorder (the county clerk serves as recorder). For a home near Smiths Ferry, use the instrument number from the tax record and the lookup takes minutes.
Taking the map into the field
Most viewers work in a phone browser, handy when you're parked on a road near Yellow Pine, though signal can drop in rural spots. A printout of the tract near Cascade keeps working without signal.
Atlas or legal document
With a lot near Yellow Pine, a plat book is not a recorded plat: the recorded plat at the County Recorder (the county clerk serves as recorder) is a legal document, and the atlas is just a guide.
A homemade atlas
Print parcel views near Salmon-Challis National Forest township by township and keep them in a binder for the truck.
Which office to call
Recorded documents for a parcel near Cascade come from the County Recorder (the county clerk serves as recorder), often with an online index. Building or septic questions for a lot near McCall are for the local planning and health departments, town or county, depending on location.
Frequently asked
Should I use the Idaho statewide Parcels layer in ArcGIS Map Viewer instead for land near Salmon-Challis National Forest?
The viewer covers town lots near Boise National Forest too; many people use both.
Are plat book lines exact near Payette National Forest?
With a lot near McCall, plat book acreage and lines are approximate.
Is a plat book legal proof near Donnelly?
If the land is near McCall, a plat book is a privately published atlas.
Who sells plat books in Valley County?
Usually, editions come and go.
Who do I call about a parcel near Boise National Forest?
For land near Payette National Forest, assessment goes to the County Assessor and deeds to the County Recorder (the county clerk serves as recorder); planning offices cover zoning near Boise National Forest
Open the official Valley County, ID parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.