Blog · September 24, 2026 · Colorado
Larimer County, Colorado GIS Parcel Map Guide
The Land Information Locator (LIL) is Larimer County’s free parcel viewer. Use it for property lines, acreage and owner lookups from Fort Collins to Red Feather Lakes. Digitized county atlases go back to 1940 if you want the history.
Main page: Larimer County, CO GIS & Parcel Viewer (official map link, Larimer County facts and neighboring maps).
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Larimer County climbs from irrigated farmland on the plains to 12,000-foot peaks in Rocky Mountain National Park, and the parcels change just as dramatically. The county’s Land Information Locator (LIL) is its official public parcel map, and it is the fastest way to see a lot, its owner, and its surroundings before you drive up the canyon to look.
Platbookmapper lists LIL on the Larimer County line of our Colorado directory; you can also click the county on our national map.
What the Land Information Locator does
LIL is a Geocortex-based web map that ties parcel boundaries to the Larimer County Assessor’s records. You can search, click a parcel, read the owner and property details, and switch among basemaps and reference layers. It covers cities and unincorporated areas alike, so it handles a Fort Collins townhome and a 35-acre mountain tract in the same way.
Search LIL by address, owner, or parcel/schedule number
- Open LIL and use the search tool for an address, owner name, or parcel/schedule number.
- Select the result to zoom to the parcel and open its details.
- Check the land area, property class, and links to the assessor’s record.
- Change the basemap to aerial imagery to see structures, driveways, and forest cover.
- Open the layer list to look for zoning, floodplain, or hazard information if published.
- Print or screenshot the map with today’s date.
LIL not loading?
LIL is a full web-map application. If it hangs, reload it, allow pop-ups so parcel reports can open, and try a desktop browser. The Larimer County line of our Colorado directory always links to the current version.
From Fort Collins to Red Feather Lakes
Fort Collins is the county seat and home to Colorado State University. Loveland sits to the south; Wellington, Timnath, and Berthoud are smaller towns on the plains, and Windsor and Johnstown straddle the line with Weld County. Estes Park is the mountain gateway to Rocky Mountain National Park. Up the Poudre Canyon and out toward Red Feather Lakes, Livermore, and Glen Haven, you find cabins, mountain subdivisions, and large ranch parcels — the areas where people most often ask about access and fire risk.
Is Larimer County GIS accurate enough for a boundary?
No. It’s good enough for finding and screening a parcel. The Larimer County Assessor maintains the parcel and valuation data in LIL, and its lines are compiled from deeds and plats. Mountain parcels, old mining-era claims and ranch land described by metes and bounds are where the map and the ground most often disagree. Deeds, plats and easements are recorded with the Larimer County Clerk and Recorder, and a Colorado licensed surveyor decides where the boundary is. For more Colorado counties, see our Colorado parcel map guide and the Jefferson County guide, or browse the Colorado county GIS hub.
Mountain parcels: fire, access, and water
Wildfire history is visible from above
The 2020 Cameron Peak Fire burned in western Larimer County and became the largest wildfire in Colorado’s recorded history, and the 2012 High Park Fire burned west of Fort Collins. Aerial imagery in LIL can show burn scars, thinning, and defensible space around structures. Insurance availability and building requirements in wildland areas are worth researching early.
Road access and easements
Many mountain parcels are reached by private roads, shared driveways, or seasonal routes. The parcel map shows where a lot sits relative to roads, but it does not confirm a recorded access easement or who maintains a road in winter. Our guide to road frontage and right-of-way explains what to check.
Water and wells
In Colorado, water rights and well permits are handled through the state Division of Water Resources, separate from the parcel record. A mountain lot without a permitted well or a water source can be hard to build on. Treat that as a first question, not a closing detail.
How to find property lines in Larimer County
- Find the parcel in LIL and write down the parcel number and legal description.
- Request the deed and any plat or survey from the Clerk and Recorder. Mountain subdivisions often have plats. Older ranch land may rely on the deed description and section corners.
- Walk to the corners with the plat in hand. In the foothills, a Colorado atlas and gazetteer helps on forest and county roads where cell service drops.
- Hire a Colorado licensed surveyor before you fence, build or buy where the line matters.
Larimer County acreage map: farms, ditches and the Front Range edge
East of the foothills, Larimer County has a long agricultural history built on irrigation ditches and reservoirs. Parcels near the growing towns are being subdivided, and ditch company rights-of-way can cross private land. When a listing mentions shares in a ditch company, that is a separate asset from the land itself — verify it with the ditch company. For acreage math on irregular farm parcels, see measuring acreage in a parcel viewer.
Larimer County plat book: free, historic and archived atlases
Larimer has no current commercial plat book. LIL is the free, up-to-date ownership map. The history is well covered, though. The Fort Collins History Connection, the city and library’s local history archive, has digitized Larimer County plat atlases, including a 1940 atlas of township plats with landowners, acreage, canals and schools, plus later editions from the 1950s to the 1970s. Put an old atlas page next to LIL and you can see how a ranch was split up over the decades. For public hunting land, Colorado Parks and Wildlife publishes its own maps. For permission on private plains ground, click the parcel in LIL to find the owner of record.
Who uses LIL
CSU families buying near campus, first-time buyers in Loveland, cabin shoppers in the canyons, ranchers and farmers, builders, surveyors, and title companies. After a wildfire or flood, residents and insurers use it to identify affected parcels.
Frequently asked questions
What is the Larimer County Land Information Locator?
LIL is the county’s public web map. It ties parcel boundaries to Larimer County Assessor records and adds basemaps and reference layers.
Are there old Larimer County plat maps online for free?
Yes. The Fort Collins History Connection has digitized Larimer County plat atlases, including a 1940 edition with landowner names and acreage.
Does LIL show water rights or well permits?
No. Water rights and well permits in Colorado are handled by the state Division of Water Resources, separately from the county parcel record.
Can LIL confirm legal access to a mountain lot?
No. It shows where roads sit relative to the lot. Confirm recorded access easements and road maintenance with a title company and the county.
Open the official Larimer County GIS viewer Larimer County 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.