Can't remember them all. Mostly in PA, MD, NY, NC, WA, MT, ID, SC, CO, VA and HI. Some are private airstrips that do not have publicly known identifiers.
Just learned of HG pilot in Bend Oregon area who acquired his EGO trike this past spring. He has some awesome photos of some flights last week to several of the tall mountains within about 50 miles from Bend. In some cases he is climbing to 14,000 to 14,500' to get some incredible shots. Here is one of them after a fresh snow on Mt. Jefferson. Hey this is incredible capability for an engine with only 27hp.