Grindstone Air Harbor Airport
29C has 1 runway. The longest is 18/36 at 1,800 ft × 85 ft (turf).
FAA NASR data, cycle 2026-09-03
29C field elevation is 640 ft MSL. The standard traffic pattern altitude at 29C is 1,640 ft MSL (1,000 ft AGL).
FAA NASR data, cycle 2026-09-03
CTAF 122.9 MHz — 29C is non-towered; self-announce position and intentions on CTAF.
Check 29C against your personal minimums, plan a route to it, and see the best runway for the current wind — free.
No, 29C is a non-towered airport. The CTAF frequency is 122.9 MHz.
29C has 1 runway (18/36). The longest runway is 1,800 feet.
29C uses the standard traffic pattern altitude of 1,000 feet AGL — about 1,640 feet MSL at a field elevation of 640 feet.
29C (Grindstone Air Harbor Airport) has a field elevation of 640 feet MSL.
29C (Grindstone Air Harbor Airport) is located in Port Austin, MI.