Grindstone Air Harbor Airport
29C · Port Austin, Michigan · Huron County · map
Grindstone Air Harbor Airport is a public-use airport, 4 miles east of Port Austin, Michigan, 640 feet above sea level. Its one runway, 18/36, is 1,800 feet of grass.
The airport
- Codes
- FAA 29C
- Kind
- Airport · open to the public · privately owned
- Elevation
- 640 feet above sea level
- Control tower
- No control tower
- Attended
- unattended
- On the chart
- Lake Huron sectional
- Magnetic variation
- 7W
- In the FAA's files since
- November 1996
Runway
For understanding the field, not for navigation.
| Runway | Length × width | Surface | Lights |
|---|---|---|---|
| 18/36 | 1,800 × 85 ft | Grass, fair |
- Runway 18: trees on the approach
- Runway 36: trees on the approach
Radio frequencies
| Common traffic advisory (CTAF) | 122.9 |
Wind map live wind over the area, from Windy.com
Colours show wind speed, the moving lines its direction; drag the time bar for the coming days. Map and forecast by Windy.com.
Aircraft registered in Port Austin from the FAA register
2 aircraft are registered to owners in Port Austin, Michigan: 2 piston singles. Not every one of them is based at this airport; the based-aircraft count above is the FAA's figure for this airport alone.
Individuals are counted, never named. All aircraft registered in Michigan.
Accidents and incidents at or near this airport NTSB records · 2 since 1982, 0 fatal
Cases the NTSB recorded with this as the nearest airport, newest first. Each opens the full report in plain English.
Nearby within 30 nautical miles
The FAA's remarks as written in the airport file
- MAN-MADE or natural objects exist WI the asp needed to ensure safety in the takeoff/landing of aircraft.
- 3 feet yellow cones.
- 3 feet yellow cones.
- Ctlg obstruction exceeds a 45 degrees slp. Approach ratio 16:1 to threshold ovr +76 feet tree, 1244 feet dist, 42 feet L. approach ratio 20:1 ovr 27 feet power line, 570 feet dist, 125 feet L/R.
- Ctlg obstruction exceeds a 45 degrees slp. Approach ratio 20:1 ovr 25 feet power line, 720 feet dist, 125 feet L/R.
- Deer and large birds on and in the vicinity of airport.
Facts from the FAA's airport file effective October 1, 2026, written out in plain English; weather from the National Weather Service's aviation weather service; registered aircraft from the FAA register as of October 5, 2026; accidents from the NTSB's public database. Owners are shown only when they are an organisation; no person is named. Check the official sources before a flight: this page is for understanding an airport, not for planning one.