I know of that trail, we call it the fording back trial, it comes into aldridge creek area, though i have never gone through it into the atla side , was never any need to go through. and yes the burning coal seam is cool to look @ although it is so far under ground you can't see much, but the green grass around it is cool, there are so many places to play once in the "valley" if a person wanted to drive to elkford, 2hr from lethbridge the trails are less crowded and good snow falls and with a group of friends many memories can be made.
Look forward to meeting up with other riders