when is the eclipse in wyoming
2017 Wyoming Eclipse Festival. 1  When a once-in-a-lifetime event comes soaring over Casper, weâre going to celebrate. 2  On Aug. 21, 2017, join scientists, photographers, eclipse chasers and thousands of residents from across the globe in a march to the Line of Totality in Casper. With an altitude over 5,000 feet and high probability of clear skies, our little Wyoming town will be one of the best places in the nation to view this celestial spectacle. While 2.5 minutes of eclipse rapture is worth the trip to Casper, weâll have a full schedule of special activities and programs all week long.