Tri-County Regional (KLNR), Wisconsin
Landing essentials
Whether you can land, whether you can refuel, and how customs works here.
Overview
Tri-County Regional (KLNR) is a public-use, non-towered airport in Lone Rock, Wisconsin, sitting at 717 feet elevation and reachable via Madison Approach / Departure for clearance delivery. The field pairs a 5,000-foot paved runway with a shorter 1,850-foot crosswind strip, and self-service fuel is available at all hours. Business aviation activity in 2025, as tracked by FAA TFMSC, accounted for the large majority of the airport's annual operations, with several general aviation fields within roughly 20 to 30 nautical miles offering nearby alternates.
Runways
Tri-County Regional has two paved runways. The longest, 09/27, is 5,000 ft long and 75 ft wide, with an asphalt surface.
Runway geometry from published threshold coordinates. Not for navigation.
Runways are listed longest first.
Source: FAA Form 5010.
Fuel and airfield services
Tri-County Regional has Jet A+ and 100LL available on the field. Fueling is available from 8am to 5pm, daily, and the airport has no control tower.
Source: FAA Form 5010 / NASR.
Customs
Tri-County Regional does not clear customs. The nearest port of entry is Chicago / Rockford International (KRFD), 78 NM away.
Source: CBP list of ports of entry.
Business aviation traffic
Tri-County Regional recorded 337 business aviation movements in 2025. Traffic peaks in September. Business aviation traffic at KLNR concentrates notably in September and October, with September logging the year's highest monthly count.
Business jet movements, FAA TFMSC count. Peak month September, 52 movements in 2025.
Source: FAA TFMSC, business jet movements, 2025.
Climate
Tri-County Regional averages 4.7 days above 90°F in July and 29.7 freeze days in January. July is the warmest month, with average highs of 82.7°F, and January the coldest, at 27.5°F.
Weather station is on the field. Some values are estimated by the agency. 1991–2020 climate normals.
Source: NOAA NCEI.
Operating constraints
Tri-County Regional has published operating constraints in two categories: access and other notes.
For clearance delivery, contact Madison Approach/Departure Control. When Madison Approach is closed, contact Chicago ARTCC for clearance delivery instead.
Runway 09/27 medium intensity runway lighting is preset to low intensity from sunset to sunrise; pilots can increase intensity and activate the runway end identifier lights on runways 09 and 27, as well as the medium intensity runway lighting on runway 09/27, via the common traffic advisory frequency. Runway 18/36 medium intensity runway lighting is also controlled via the common traffic advisory frequency. The precision approach path indicators on runways 09 and 27 operate continuously.
Self-service fuel is available around the clock via credit card.
The visual glide slope indicator operates continuously.
This is a cold temperature airport. Altitude correction is required at or below minus 31 degrees Celsius.
Source: FAA Chart Supplement.
Nearby airfields
Tri-County Regional has five airfields within 29 NM. The closest is Iowa County (KMRJ), 19.67 NM south.
Source: Skystar calculation from official coordinates.
Skystar at KLNR
We arrange catering, fuel and trip support here. Supplier prices reach you unchanged; our coordination fee sits on its own line.
The same order, priced two ways.
$1,200.00 catering order at KLNR.
Unchanged.
What the kitchen invoices us is what your quote reads.
One line, fixed.
It does not move with the size of the order.
At cost.
Passed on at the exact amount the processor took.
Market practice figures are industry averages, not a specific competitor.
Frequently asked questions
What runway length is available at KLNR?
Tri-County Regional (KLNR) offers a primary paved runway of 5,000 feet, designation 09/27, with a 75-foot width and asphalt surface. A secondary paved runway, 18/36, measures 1,850 feet by 60 feet. The longer runway supports most business turboprops and light jets operating into this Lone Rock, Wisconsin field.
Is fuel available at Tri-County Regional?
Tri-County Regional stocks both 100LL and A+ fuel, and the field is listed as having Jet A availability as well. Self-service fuel is available around the clock via credit card. This makes KLNR usable for after-hours refueling without needing to coordinate with attendant staff.
Does KLNR have on-site customs clearance?
KLNR does not have customs service on site. The nearest customs facility is at KRFD, located approximately 77.5 nautical miles away. Flights requiring customs clearance near Tri-County Regional should plan to route through that facility instead.
When is Tri-County Regional attended, and how busy is it?
Tri-County Regional operates on an attendance schedule of Monday through Friday, 0800 to 1700 local time. According to FAA TFMSC data, the field logged 337 business aviation operations in 2025 out of 415 total annual operations, placing it in a moderate-traffic tier. Traffic at KLNR is not evenly distributed across the year, with a marked increase in September.