For these covers from @McGeekiest Cachets, I used one Wyoming single from the National Park Service Centennial issue of 2016 (Scott #5080n). The cachet matches the design for my 5080 FDCs: a photograph taken in the park, warped into a sphere, with a green trace behind it that makes a right-angle turn and ends in a stone arrowhead. Above the line, the name of the park is printed in a chiseled stone font.
The stamps are canceled with a "Yellowstone National Park Station" pictorial postmark from Yosemite National Park, Wyoming, 82190, dated August 25, 2016.