The timeline falls basically in June, July, August 2016 for an independent candidate to
submit the required signatures to get on the general election ballot. Some may do it in
a state or two just for self gratification but serious attempts will be limited, imo.
https://ballotpedia.org/Ballot_access_for_presidential_candidates
Here in Arkansas - the deadline for filing (even as a write-in) has come and gone.