Looks like the Area 51 race track is not alone.  There is one under
construction at Nellis and Creech with the same dimensions .5, 1 and
1.5  This info is being discussed at DLR.  Why the heck if they are
for running or jogging would you have various lengths.  If it was for
exercise, would it just be your standard track the same as any high
school would have?