Goal for marathon #3 (~2 months away) is to simply PR (sub 3:20:00). My training schedule currently has the first of three 20-milers lined up for bday weekend (my schedule also maxes at 20mi).
Am I undertrained/stupid to attempt this? Mentally, I think I got it so long I take it slow and easy like other long runs. I just don't want to sabotage my training for #3.