Grasmere Airport
U91 has 1 runway. The longest is 5/23 at 2,750 ft × 150 ft (dirt).
FAA NASR data, cycle 2026-09-03
U91 field elevation is 5,134 ft MSL. The standard traffic pattern altitude at U91 is 6,130 ft MSL (1,000 ft AGL).
FAA NASR data, cycle 2026-09-03
CTAF 122.9 MHz — U91 is non-towered; self-announce position and intentions on CTAF.
Check KU91 against your personal minimums, plan a route to it, and see the best runway for the current wind — free.
No, U91 is a non-towered airport. The CTAF frequency is 122.9 MHz.
U91 has 1 runway (5/23). The longest runway is 2,750 feet.
U91 uses the standard traffic pattern altitude of 1,000 feet AGL — about 6,130 feet MSL at a field elevation of 5,134 feet.
U91 (Grasmere Airport) has a field elevation of 5,134 feet MSL.
U91 (Grasmere Airport) is located in Grasmere, ID.