Kari, Jay W, thank you for the kind words. These are my only pictures of Lightning in Glacier Park worth sharing.
300 shutter clicks that night from the loop, from 11:40pm to about 1am I sat in the car peering at Heavens Peak. About 5-6 frames turned out showing lightning. Most didn't have enough light to show the terrain. Very long exposures, 13-17 seconds I found to work best.