Based on the clue 'big red could also have been the nickname of this ...', what is the answer?

What is associated with: big ones first held in the 1860s include canadas queens plate the belmont stakes? Based on the clue 'big perhaps like the object seen here in washingto...', what is the answer? Based on the clue 'big pocono state park is found in this state', what is the answer? Based on the clue 'big problems in the little league bad bears', what is the answer? Based on the clue 'big river featuring such characters as the widow d...', what is the answer? Based on the clue 'big river structure long period of time this i...', what is the answer? Based on the clue 'big river was inspired by mark twains book about t...', what is the answer? What is referred to by 'big salmon pelly klondike'?