Eye, how the heck is "Lochmere trail dirt" going to be singled out as being that? Lochmere is HUGE. There is no special Lochmere trail dirt. I feel as if you are playing with us. Besides that, you said you would not comment further after your first post.
Is there a difference in "Lochmere trail dirt" and say, Bond Park trail dirt? Do feel free to specify these differences in depth.
There have been many cases profiled on Forensic Files (my wife's favorite show) where a forensic geologist compared the makeup of the dirt at various locations to determine where dirt on the victim, a vehicle, or other object had come from. There are likely differences in the composition of the trail surface in different regions of the subdivision, let alone from that at Bond Park, and given samples from those regions, a forensic geologist could determine from which region a specimen likely came from.
Running on gravel is asking for a sprained ankle or a fall. What joggers do you know who love to run on gravelly trails? Do they wear cleats? Since you are so convinced and seem to have this "trail dirt", knee thing and other situations under close scrutiny, maybe you should not ask US to compare these things. Maybe in the interest of Nancy Cooper's death you should notify the authorities yourself.
My family and I took a bike ride on the American Tobacco Trail in Apex this past weekend. The surface is hard-packed, very fine gravel and/or dirt. There were many cyclists, walkers, horse-back riders, and yes, runners on that trail.
I have seen MANY runners on the unpaved trails in Bond Park on many occasions. AFAIK, ALL of the trails in Bond Park are unpaved. Runners use the trails in Umstead Park as well. The trail at the Reedy Creek Rd entrance (near Lake Crabtree) is a similar surface to that on the American Tobacco trail. I have seen runners on the mountain bike trails at Lake Crabtree Park. Talk about a rut-laden trail.