A little late to post but I also have been suffering from a ridiculous amount of back pain in the last few months.
It is soft tissue and to the right of my T7. That back pain improved with foam rolling and basically jamming a protein shake bottle and/or a racquetball right into the painful area and feeling the rib relocate.
The other back pain is sacroiliitis. Lower back, soft tissue and absolutely nothing reduces the pain. Kettlebell swings with regular Olympic weights have improved the back pain by increasing the time in the saddle. It was worse on a medium hardtail and is now better on a large dual suspension. I have also lost a few pounds are the belly area, but all in all. Kettlebell swings.
I have also noticed that stretching my hamstrings reduces the discomfort and sitting on the ground to eat has benefitted me instead of walking, which I detest.