Airport information
- FAA LID
- 21MU
- Coordinates
- 36.5649, -93.5096
- Elevation
- 1,015 ft MSL
- Airport use
- Private
- Control tower
- No
- ARTCC
- KANSAS CITY (ZKC)
- Flight service (FSS)
- COLUMBIA
- Attendance
- UNATNDD
- Segmented circle
- No
- Wind indicator
- yes
- Activated
- 2004/07
- Distance from city
- 7 SE
Weather
METAR observed
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TAF forecast
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Sun & FAA night 2026-06-21
| Event | Local (CDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:25 AM | 10:25Z |
| Sunrise | 05:56 AM | 10:56Z |
| Sunset | 08:36 PM | 01:36Z |
| Evening civil twilight Loggable night begins | 09:06 PM | 02:06Z |
Plan a flight from 21MU
Night operations
- Pilot-controlled lighting
- Usually keyed on CTAF 122.9 — confirm the click sequence in the Chart Supplement
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are in the live weather panel above.
Traffic pattern
- Landing
- Rwy 18
- Pattern
- left (turns left)
- TPA
- 2,000 ft MSL (≈1,000 AGL)
- CTAF
- 122.9
Enter the left downwind for Rwy 18 at 2,000 ft MSL (≈1,000 AGL) on a 45°. TPA estimated at 1,000 ft AGL (not charted for this field).
Runway 18/36
2,800 ft × 60 ft · Turf (Good)- Heading
- n/a
- Traffic pattern
- Left
- Heading
- n/a
- Traffic pattern
- Left
Headings shown are true (magnetic variation unavailable).
| Runway | Length | Your margin |
|---|---|---|
| 18/36 | 2,800 ft |
Nearby navigation aids
| NavAid | Type | Freq | Radial / Dist magnetic |
|---|---|---|---|
| HRO · Harrison | VOR-DME | 112.50 | r312° / 20.6 NM |
| RZC · Razorback | VORTAC | 116.40 | r053° / 35.2 NM |
VFR sectional
No published instrument procedures or Chart Supplement for 21MU. VFR sectional link above.
Ownership & management
Remarks FAA
- PRVDD A CLEAR APCH EACH RY FOR A 20:1 GLIDE SLOPE & A CLEAR TRANSITIONAL SFC FOR A 7:1 SLOPE.
- PVT AIRSTRIP - PPR. CTC AMGR.
- DAY ONLY OPS.
- FOR CD CTC SPRINGFIELD APCH AT 417-868-5620/5619.
- BE ALERT FOR DEER ON RWY.
- CTAF 122.9
- RY 18/36 SMALL CONES LINE BOTH SIDES OF STRIP.
Nearby airports
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 21MU 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.
About 21MU
The Peninsula Airport (21MU) is an airport in Shell Knob, MO, at 1,015 ft MSL. It has 1 runway, the longest 2,800 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for 21MU, refreshed from the Aviation Weather Center and FAA NASR.
Does 21MU have a control tower?
No. The Peninsula Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM on the Comms & NavAids tab.
What is the longest runway at 21MU?
The Peninsula Airport has 1 runway; the longest is 2,800 ft. See the Runways tab for headings, surface, and lighting.
Where is 21MU?
The Peninsula Airport is in Shell Knob, MO, at an elevation of 1,015 ft MSL. Coordinates: 36.5649, -93.5096.
Fly out of 21MU often?
Save 21MU 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.