Lemhi County Airport (KSMN)
Medium airport · Salmon, Idaho, United States
Airport data
| Name | Lemhi County Airport |
|---|---|
| ICAO | KSMN |
| IATA | SMN |
| Elevation | 4,043 ft (1232 m) above mean sea level |
| Coordinates | N 45°7'20" W 113°52'55" 45.12223, -113.88196 |
| Location | Salmon, Idaho, United States |
| Scheduled service | Yes |
Runways
| Runway | Length | Width | Surface | Lighted |
|---|---|---|---|---|
| 17/35 | 5,510 ft (1679 m) | 75 ft | ASP | Yes |
Lemhi County Airport at a glance
Lemhi County Airport is a medium airport in Salmon, Idaho, United States, known to airline systems as SMN. The field elevation of 4,043 ft (1232 m) is the number every arriving pilot dials against QNH — circuit heights and initial approach altitudes at KSMN are all figured from it. The airport handles scheduled commercial service, so expect controlled procedures, published approaches and commercial traffic in the pattern.
The single runway, 17/35, offers 5,510 ft (1679 m) of asp surface, with runway lighting for night operations. Runway numbers give magnetic orientation: runway 17 points roughly 170° magnetic.
For the weather side of planning, the live METAR and TAF page for KSMN shows the current observation decoded line by line — wind on an instrument dial, visibility, cloud layers and the resulting flight rules — refreshed continuously from official sources.
Nearest airports to Lemhi County Airport
Distances are great-circle, measured from the field reference point — planning distances along airways or roads will run longer.
| Airport | Code | Distance |
|---|---|---|
| Bert Mooney Airport | KBTM | 142 km (77 NM) |
| McCall Municipal Airport | KMYL | 176 km (95 NM) |
| Friedman Memorial Airport | KSUN | 183 km (99 NM) |
| Missoula Montana Airport | KMSO | 200 km (108 NM) |
| Helena Regional Airport | KHLN | 221 km (119 NM) |
Flight-planning notes for Lemhi County Airport
Density altitude is the quiet performance-killer at any field: on a hot day the 4,043 ft field elevation of Lemhi County Airport can translate into a substantially higher density altitude, stretching take-off rolls and flattening climb rates — run the numbers rather than trusting the feel of a standard day. Expect published instrument procedures, controlled airspace and clearance requirements; slots and handling may apply to general aviation traffic.
This entry is one of 917 airports and airfields we list for United States — the country index on the airports hub links the rest. Coordinates above are given in both DMS and decimal degrees so they can go straight into a GPS, a flight planner or a chart plot without conversion.
Where this data comes from
The reference layer behind this page builds on the OurAirports dataset — a public-domain, community-maintained register of the world's airports that many flight planners and apps rely on — with equity records preserved from documented historical listings where the dataset is silent. Figures are carried as published: elevations as surveyed, coordinates as filed, runway dimensions as recorded. Nothing is estimated to fill a gap, and the whole layer regenerates from source on every site build, so corrections upstream arrive here automatically.
Frequently asked questions about Lemhi County Airport
What is the ICAO code of Lemhi County Airport?
The ICAO identifier of Lemhi County Airport is KSMN, and its IATA code is SMN. The ICAO code is the one used in flight plans, METAR reports and aeronautical charts.
How high is Lemhi County Airport above sea level?
Lemhi County Airport sits at an elevation of 4,043 feet (1232 metres) above mean sea level. Field elevation is the reference for pattern altitudes and for setting the altimeter on the ground.
Where exactly is Lemhi County Airport located?
The airport lies at 45.1222, -113.8820 — in Salmon, Idaho, United States, in the northern hemisphere. The closest listed field is Bert Mooney Airport, about 142 km away.
Does KSMN publish METAR weather reports?
Where the station reports, the current METAR and TAF for KSMN appear on its live weather page on this site, refreshed continuously from the US NWS Aviation Weather Center feed.
How long is the runway at Lemhi County Airport?
Lemhi County Airport has one runway. The longest, 17/35, measures 5,510 ft (1679 m) with a ASP surface.