North Branch Trail and Kengla Trail 18704 Wickham Drive, Olney, MD 20832, USA Olney Maryland 20832 The North Branch Trail and Kengla Trail in the North Branch Stream Valley consists of hard surface and natural surface sections. It makes up a significant part of the 13-mile Mid-County Loop trail system. Previous Next Outdoor Experience TrailsTrail Guide Website Map Directions Previous All Listings Submit a Listing