The Duck Hollow trail is 1.4 miles long. It's a nice place to walk or stroll through the woods along the banks of the Monongahela River, away from the noise of cars and trucks. You can reach this trail from Frick Park via the Nine Mile Run trail, a crushed limestone / gravel trail that opened in May 2010. The NMR trail extends from Commercial St along Nine Mile Run to the Monongahela River at the little community of Duck Hollow, where you ride down Old Brown's Hill Road a bit, under the railroad bridge, and then through the big Duck Hollow parking lot to get to the beginning of Duck Hollow Trail, which is paved. Across the river you'll see Sandcastle waterpark. DH trail's downstream end is under the Glenwood Bridge. It's pretty safe, but a little inconvenient (carry your bike), to cross the 5 RR tracks -- there are few trains here and I've crossed these tracks at least 20 times and never been hassled. Crossing the tracks gets you to 2nd Avenue so that you can bike either through Hazelwood toward Oakland or across the Glenwood Bridge to the south bank, near Sandcastle.
Maps: go to maps.google.com, roll over "Traffic" and click on "Bicycling", or go to http://www.friendsoftheriverfront.org/files/heritage_trail.html and see their PDF map.
Steel Valley Trail Council and Friends of the Riverfront are working to create a better bicycle connection at the Glenwood Bridge. With the Great Allegheny Passage trail expected to be (finally) completed near Sandcastle in 2011 or 2012, this would be an excellent time to connect Duck Hollow Trail properly. We'd also like to get a trail built downstream from there through Hazelwood to connect the DH trail to the Eliza Furnace Trail (aka Jail Trail) toward downtown Pittsburgh, and upstream from Duck Hollow past Carrie Furnace to Rankin and across the river on the abandoned Rankin Hot Metal Bridge. If you'd like to help with these efforts then please email me at ph@cs.cmu.edu .
Unfortunately, expensive porkbarrel freeway construction projects often take priority over less expensive but more beneficial trail construction projects, but if enough people speak out, we can help correct that. read more