Wouldn't official_name=Mount McKinley be more correct? loc_name= is for a local name, and i don't live in Alaska so i can't say for sure, but i'm pretty sure most Alaskans aren't using Mount McKinley; so i think official_name= would fit more as that is the government's name for the mountain. On the Gulf of Mexico, the US government name is tagged as "official_name:en-US=Gulf of America" which could be done here although i doubt "en-US" would be needed since Denali is only within the US.