I just (5/8/24) called and talked to a ranger at the Eastern Sierra Visitor Center just south of Lone Pine asking about the use of the Ursack in the Whitney Zone. She indicated that Ursacks are approved but not recommended just as the ranger at the White Mountain Visitor Center did last year. Apologies but I don't know the "geography" very well in the area. Have to do some homework on the Whitney Zone, Inyo, and Sequoia. She did state that Ursacks are not approved in the Sequoia area and that the summit of Whitney is in Sequoia. Usrsacks are approved at Trail Camp which is in the Whitney Zone. No one would take an Ursack to the top anyway so it seems that Ursacks are practically speaking approved in the Whitney Zone. We will use odor proof Opsacks in the Ursack.