The idea here is to hike/run all 900 miles of trail in Great Smoky Mountains National Park.
Benny "Plug-It" Braden completed the GSMNP 900 in 78 days:
"I began my #fastestgsmnp900miler on Dec. 31, 2016 and completed it on Mar. 18, 2017. My FKT is currently 2 months and 19 days or 78 days. I will be doing this hike again in the fall and looking to take this time under 1.5 months or 45 days. To my understanding the 900 Miler Club only recognizes hiking the trails and not trail running. You can check my Facebook page "Plug-it In on the Appalachian Trail" to see the trip reports and pics from this hike."
Braden completed the 900 *again* later the same year in 43 days:
"Thank you jwoo for clearing that up and congratulations on your completed maps. To update my last post, I did complete my 2nd map (gsmnp900miler) in the fall of 2017. I started 10/14/17 and finished 11/25/17. This FKT thru-hike of the GSMNP was 100% hiked with no trail running. As of right now and to the best of my knowledge I hold the fastest known time of 43 days and the lowest miles of 924.3. Also to the best of my knowledge I know of only one other person (Sharon Spezia) who has completed 2 maps in a single year. I was supported with shuttles when needed.
Jwoo, do you know of anyone else who has started and finished 2 maps in a single year?"
Any idea on how many miles were repeat miles? Looks like it would be tough just figuring out how not to backtrack.