Blog · October 14, 2026 · Montana
Using the Valley County Flood Zone Map
Flood zones are set by FEMA, and checking one near Glasgow takes a few minutes.
Main page: Valley County, MT GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Larslan? Checking the Valley County flood zone map reveals whether FEMA puts it in a high-risk zone, and it costs nothing to check. Covered here for this county: finding the address on FEMA's map, reading the zone codes, and pairing it with the county ArcGIS parcel map, at least around Hinsdale.
Checking the Valley County flood zone map step by step
On ground around Frazer, start with FEMA's Flood Map Service Center: enter the street address, and choose the dynamic map. Vacant ground around St. Marie is still easy to locate: search the nearest road and click inside the land.
The free map to start with
Begin with the Valley County ArcGIS parcel map; it includes each tax parcel in the county, Larslan included. On ground around Opheim, enter a street address, an owner's name or a parcel number, and the matching parcel lights up. With a lot near Glasgow, the record panel typically gives the owner of record, acreage on the tax roll, a parcel ID and sometimes recent sales.
A short flood checklist
On ground around Glentana, request whether the home has flooded before closing; getting a quote early keeps the budget honest.
Zones on the Valley County flood zone map
For a home near Frazer, any A or V zone mark the Special Flood Hazard Area, which FEMA defines as a 1% annual chance of flooding. With a lot near Glentana, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
Reading the legal description
Montana is laid out under the Public Land Survey System, which means a tract near Glentana is described by section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though corrections make some sections near Opheim odd-sized. Write down the legal description for the tract near Larslan for any title or survey request.
Matching the zone to the lot lines
FEMA's map shows zones but not ownership, so open the Valley County ArcGIS parcel map next to confirm you have the right parcel near Frazer.
Valley County in a few facts
Glasgow serves as the county seat, which is where the courthouse records live. You'll also find Fort Peck, Nashua, Opheim, and Frazer. Roughly 7,474 people live in Valley County (Census estimate, 2023) on roughly 4,926 square miles. Valley County was organized in 1893, which matters when you trace an old farm's title.
Before you lean on the lines
If the land is near Hinsdale, acreage on the record is a tax-roll number; just a licensed surveyor sets the real boundary on the ground. Out toward Opheim, records update in batches, so a deed recorded last month might lag behind.
On site with the map
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Nashua, though signal can drop in rural spots. A saved image of the lot near Glentana and its lines is a good backup.
Neighboring parcel maps
The county meets Daniels County, Garfield County, McCone County, Phillips County, and Roosevelt County, all with their own assessor records, especially near St. Marie. A tract near the line by Fort Peck can show up across two assessors' files, so check the neighboring map before you assume the acreage. In and around St. Marie, the Platbookmapper state page links every neighboring county map across Montana.
The paper trail behind a parcel
For anything that matters, pull the recorded deed from the County Clerk and Recorder; the parcel line is a drawing of it, whether the land is near Opheim or elsewhere in the county. On ground around St. Marie, bring the book and page from the tax record so staff can find the deed fast.
Insurance, lenders and building
For a structure inside an A or V zone and the loan is federally backed or regulated, mandatory purchase rules apply in communities in the NFIP, which applies near Glentana as much as anywhere. New construction in a floodplain near St. Marie often needs a floodplain permit; check with the county or town building office before you plan.
Beyond the mapped zones
Low-lying fields near Nashua may not have detailed mapping, so look for water marks and debris lines. Marshy spots near Hinsdale can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Valley County: common questions
How often are flood maps updated around St. Marie?
For acreage around Glentana, FEMA revises flood maps panel by panel as new studies finish, so look at the panel date.
When is flood insurance required near Glentana?
For a parcel near Hinsdale, it's typically required only for structures in high-risk zones with federally backed loans, in communities that take part in the NFIP.
Is Zone X safe from flooding for land near St. Marie?
If you're looking near Frazer, shaded X is moderate risk and unshaded X is minimal risk, and floods still happen outside high-risk zones.
What is a base flood elevation near St. Marie?
In and around Hinsdale, the base flood elevation is the water level expected in the 1% annual chance flood, and an Elevation Certificate compares the building to it.
What's a legal description around Frazer?
Around St. Marie, it's the formal description of the land in the deed, and the parcel record often summarizes it.
Open the official Valley County, MT 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.