You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: RHYMES WITH ME 
Clue: Piece of equipment for Picabo Street
ski

Category: U.S. RIVERS 
Clue: The Falls of Saint Anthony stop this mighty river from being navigable north of St. Paul, Minnesota
the mississippi

Category: ENDURANCE 
Clue: In 1934 & 1935 history's longest march covered 6,000 miles, 18 mountain ranges & 24 rivers, in this country

china