"bicycle"=>"designated","foot"=>"designated","network"=>"Hillside","oneway"=>"no","piste:difficulty"=>"intermediate","piste:grooming"=>"classic+skating","piste:name"=>"Birch Knob Trail","piste:type"=>"nordic","segregated"=>"no","smoothness"=>"bad","surface"=>"dirt","tiger:cfcc"=>"A41","tiger:county"=>"Anchorage, AK","tiger:name_base"=>"Campbell Airstrip","tiger:name_type"=>"Rd","tiger:reviewed"=>"no","width"=>"4"