Beautiful country with several airports in NE Washington and N Idaho - Priest Lake is located a short distance to the east.
This is what the Washington State Department of Transportation (WSDOT) has to say about Sullivan Lake State airport:
"Sullivan Lake is a unique recreational paradise. There are many forms of recreation available. One can swim, fish, boat, and camp. There are resorts nearby and a Forest Service Campground, with all the amenities, just through the fence. You can camp on the airport, and use the picnic tables along the west edge. At Sullivan Lake, you can really enjoy the out of doors and relax in your own way.
The 1900 foot turf strip slopes uphill to the north, and is somewhat rough. It has one big problem. The ground squirrels dig their burrows faster than we can fill them up. With the help of the volunteers, we have made fantastic gains in staying ahead of the little creatures, but there are still holes. The 2,614 foot field elevation and the hot summers do cause density altitude problems. There are trees on the north threshold and along both sides. Terrain rises fairly rapidly to the north and the canyon walls narrow quickly. The approach from the lake is clear, and departures over the lake are relatively simple. Animals love to graze on the runway, and nearby campers appear to like playing baseball on the field. Overflight is essential to check the airport, move the animals and people, and to locate any burrows which might be in your landing path. Wind indicators are located on the northwest and southeast edges of the runway. Do not land on the extreme west edge as the picnic tables will ruin your whole day. The airport is generally open from June 1st to October 1st."
Lat: 48.84089527778 , Long: -117.28398583333 - WASHINGTON, USA