The trail is in the wild. I've never ridden with any of my dogs. I have gone hiking with them and rememeber one time when I was hikeing a fire road and people coming the other direction warned my about coyotes.
Now my pair were a joined at the hip mismatch of an oversized Belgian Sheepdog and a smallish Presa Canario. Menaing they were both 105 lbs and were in no danger. I was in danger of having to chase dogs and coyotes miles through the brush.
On my very first mountian bike ride I almost ran over a rattlesnake. I have come across them several times riding. I would not want to try to control a dog while on hte bike when suddenly confronted with such.