This loop is close to 3.5 to 4.0 miles depending from where one starts.  It's more close to 3.5 miles if you start and finish from the Fitness Club.

From the Fitness Club run away from town on Argyle, passing the Fair Grounds on your left.  Turn left on to Cattle Point Road and carefully follow Cattle Point down to the end of the Air Port Security fence and turn right on Shelter Road (Shelter Road is the road where the Animal Shelter is located).  Follow the security fence up the road and turn right, through the gate, on the access road.

This access road basically follows the perimeter of the Air Port, and will turn a sharp left.  Follow the access road up the hill and down the other side and through the gate.  Skaigt College will be on your right.  This road, Weber Road, will wind down to Franklin Drive.  Turn left on Franklin Drive and cross the road to run on the path along the fence which will take you to Spring Street on the Clark McAlpine Cross Country Trail.  (If one wanted to run longer, stay running on Franklin Drive until Spring Street and follow that back to the start.  This will add about .5 miles.)

On Spring Street turn right towards town, following the street until Argyle.  Turn right, again, to the starting point.

Distance:  3.5 miles (give or take) or 4.0 if you take Franklin Drive all the way to Spring Street.