Location   Poplar Grove Airport  - 11619 Route 76 - Poplar Grove, IL 61065 Poplar Grove Vintage  Wings & Wheels Museum is located on the north side of the Poplar Grove Airport, Poplar Grove, Illinois. From the city of Belvidere, Illinois, go north on Route 76 (Fairgrounds Road) approximately 4.5 miles, and turn right on Orth Road.  Go half a mile, and the Museum is on the right. Land Directions Flying In? Our FAA airport identifier is C77, and our Unicom frequency is 122.8. A paved taxiway at the northwest end of Runway 12/30 connects to the Museum ramp.