I just finished a 19.682km cycling that lasted about 1hh:41mm:5ss !
Nice workout with 
Doing the "Tour of fire and ice" in zwift -- which is essentially just a long hill climb. I made it to, I think, Turn #13 or something? Probably my longest ride yet. Proud of the 90 minute effort.
Could have raised my FTP setting a bit. I should do an FTP test on Thursday.
Check out some detailed info at my EXHAUST page
Join me in testing out EXHAUST!