Sauk-Prairie Airport
91C · Prairie Du Sac, WI · Non-towered · Print kneeboard
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-04 · night begins 08:50 PM
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:20 AM | 10:20Z |
| Sunrise | 05:52 AM | 10:52Z |
| Sunset | 08:18 PM | 01:18Z |
| Evening civil twilight Loggable night begins | 08:50 PM | 01:50Z |
Plan a flight from 91C
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Advisories
NOTAMs
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Pilot reports
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Airspace hazards
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Runways
RWY 18LEFT traffic
- Heading
- 177° mag · 177° true
- Dimensions
- 2,936 × 60 ft
- TPA
- 1,800 ft MSL (≈1,000 AGL) · standard
- Surface
- Asphalt
- Lights
- 2-light PAPI (left) (3°)
- CTAF
- 122.9
Enter the left downwind (heading 357°) on the 45° at 1,800 ft MSL (≈1,000 AGL).
More details — RWY 18
- Threshold elev
- 831 ft
- Markings
- nonprecision
- Threshold crossing height
- 26 ft
- TDZ elevation
- 832 ft
- End lights
- REIL
Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 18/36 | 2,936 ft |
Prefer one flat page? Full runway details for 91C → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the 91C kneeboard →
Comms & NavAids
Communication frequencies
Taxi & takeoff
Departure & arrival
“Madison”Also
ATC assigns the exact frequency (in your clearance or on handoff) — which one depends on your SID (departing) or STAR (arriving).
By procedure & sector (2 frequencies)
| Frequency | Used by |
|---|---|
| 257.925 | LONE ROCK RCAG (LOW) |
| 343.7 | APCH/P DEP/P |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
DLL 117.00 · MSN 108.60
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| DLL · Dells | VORTAC | 117.00 · 117X | High | r176° / 15.2 NM |
| MSN · Madison | VORTAC | 108.60 · 23X | Low | r294° / 20.4 NM |
Prefer one flat list? All 91C frequencies →
Charts & procedures
Airport info
Airport information
- FAA LID
- 91C
- Coordinates
- 43.2979, -89.7558
- Elevation
- 832 ft MSL
- Magnetic variation
- 0E
- Sectional chart
- CHICAGO
- Airport use
- Public
- Control tower
- No
- ARTCC
- CHICAGO (ZAU)
- Flight service (FSS)
- GREEN BAY · 122.2 · 1-800-WX-BRIEF
- NOTAM facility
- GRB
- Attendance
- UNATNDD
- Beacon
- white-green (SS-SR)
- Segmented circle
- No
- Wind indicator
- lighted
- Activated
- 1963/01
- Distance from city
- 2 W
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT MIRL RY 18/36, REIL RYS 18 & 36, & PAPI RYS 18 & 36 - CTAF. on 122.9 — Chart Supplement ↗
Runway lighting aids — 18: 2-light PAPI (left) · 36: 2-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are under Sun & FAA night in the Weather section.
Services fuel · repairs · oxygen · attendance
- Fuel available
- 100LL, UL94
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- NONE
- Powerplant service
- NONE
- Parking
- tiedowns
- Other services
- Instruction, Aircraft sales
Ownership & management 2 contacts
Remarks FAA · 10 notes
General
- ULTRALGT & HEL ACT ON & INVOF ARPT.
- MAINT VEHICLE TFC ON AND INVOF ARPT.
- W RAMP AND TWY PVT, CLSD TSNT.
- AVOID HOSPITAL/HELIPAD 3,000 FT SOUTHEAST OF RY 36 THLD.
- RY 18 DEPS CLIMB TO 1,800 FT MSL ON RY HEADING BFR TURNING EAST/SOUTHEAST.
- TKOFS & LDGS ARE PROHIBITED ON UNPAVED SFCS.
- FOR CD CTC MADISON APP/DEP CON AT 608-249-8240. WHEN MADISON APCH CLSD, FOR CD CTC CHICAGO ARTCC AT 630-906-8921.
Lighting
- ACTVT MIRL RY 18/36, REIL RYS 18 & 36, & PAPI RYS 18 & 36 - CTAF.
Fuel
- 24 HR SELF SVC FUEL AVBL WITH CREDIT CARD.
Obstructions
- 25 FT TREES AT RWY END, 225L.
Nearby airports
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Also nearby: 34WI Thiessen Field (private) (7 NM) · WI50 Loeber McDaniel Field (private) (8 NM) · 9WN5 Lodi Lakeland Airport (private) (10 NM) · WI66 Hallick Farm Airport (private) (12 NM) · 5WN2 Eberle Ranch Airport (private) (12 NM) · WI65 Dane Airport (private) (13 NM)
About 91C
Sauk-Prairie Airport (91C) is an airport in Prairie Du Sac, WI, at 832 ft MSL. It has 1 runway, the longest 2,936 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 91C, refreshed from the Aviation Weather Center and FAA NASR.
Does 91C have a control tower?
No. Sauk-Prairie Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at 91C?
Sauk-Prairie Airport has 1 runway; the longest is 2,936 ft. See the Runways section for headings, surface, and lighting.
Where is 91C?
Sauk-Prairie Airport is in Prairie Du Sac, WI, at an elevation of 832 ft MSL. Coordinates: 43.2979, -89.7558.
Fly out of 91C often?
Save 91C as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open 91C in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.