Calendar of Events

Upcoming by Date

  • Birds of the Wissahickon: Breeding Bird Survey

    7:00 a.m.

    As part of our Bird Conservation Initiative, WVWA invites the public to take part in a breeding bird survey on May 30th.  Participants will spend the morning learning about the behavioral characteristics of breeding birds, survey methods, and the importance of avian conservation, all while experiencing the beauty and diversity of the birds of the Wissahickon!

  • Tree ID Walk with Ken LeRoy

    10:00 a.m. - 12:00 p.m.

    Back by popular demand!  Join Arborist Ken LeRoy on a tree-themed exploration of Briar Hill and Prophecy Creek now that the trees have leafed out.  Here we’ll visit a state champion Sycamore, wander through old fields now successioned into woods and explore the banks of gentle Prophecy Creek.

  • Family Hike at Crossways Preserve

    1:00 p.m. - 2:30 p.m.

    The 57 acres of the Crossways Preserve is a landscape of extreme natural features. Meadows with native grasses and wildflowers, stands of towering hardwood trees, wetlands with cattails, and small rivulets that emerge from the ground with cold, clear water. All of this diversity accounts for why the Crossways Preserve has the highest number of native plant species of all of the WVWA Preserves, and why it is such an important natural area to preserve. Come learn about the species that live in such a diversity of habitats, and see why Crossways is such a special place!

  • National Trails Day Hike with Get Out and Go Montco

    10:00 a.m. - 12:00 p.m.

    Celebrate National Trails Day with WVWA and Montgomery County Planning Commission at Crossways Preserve, WVWA's most ecologically diverse tract of preserved land. Crossways offers a mixture of extreme natural features and an array of habitats, from restored meadows of native grasses and wildflowers, to historic woodlands and early-successional habitat, frequented by gorgeous butterflies and singing birds. 

  • A Healthy Wissahickon: We All Have a Part to Play

    7:00 p.m. - 8:30 p.m.

    Come to the Four Mills Barn for a film showing the history of the Wissahickon Creek, the development of the Wissahickon Valley, and how it has affected our waterways! See how citizens and municipalities from all over the watershed are getting involved to solve these global problems, and join us afterwards for Q&A. Film created by GreenTreks.

  • Family Hike along Green Ribbon Trail

    1:00 p.m. - 2:30 p.m.

    Keeping a Naturalist’s Journal
    Bring a notebook and pencil and learn how to document what you see! We’ll sketch the plants, insects, wildlife, and anything we find interesting along the trail, and take note of what natural events are taking place this time of year. 

  • Designed by Nature Garden Tour

    10:00 a.m. - 2:30 p.m.

    The Designed by Nature Garden Tour will feature seven Ambler area gardens that showcase native plants and naturalistic design to attract birds, butterflies and other pollinators.

  • Family Hike & Photo Walk at Willow Lake Farm

    1:00 p.m. - 2:30 p.m.

    Bring your camera along for a hike at Willow Lake Farm, where 24 species of butterflies have been identified. Take photos of all the beautiful plants, insects, wildlife and natural wonders this preserve has to offer!  

  • Evans-Mumbower Mill Open House & Antique Car Show

    1:00 p.m. - 4:00 p.m.

    Bring Dad (and Mom too!) to see a variety of antique cars for Father’s Day the Evans-Mumbower Mill, take a tour of the mill to see the water-powered gristmill in action.

  • 26th Annual Tex Mex 5k Race for Open Space


  • Moths - The Silent Majority

    7:00 p.m. - 9:00 p.m.

    Back by popular demand! Discover the mysterious creatures of the night that fly under the cover of darkness with Blaine Rothauser, a lifetime naturalist and biologist who is President of BR Environmental Services.  Learn about the variety of moths and butterflies found in the Wissahickon Watershed. 

  • Family Hike at Penllyn Woods

    1:00 p.m. - 2:30 p.m.

    Join us for a hike through wooded and wetland areas as we look for interesting plants and insects… and snapping turtles!

  • Butterfly Walk

    10:00 a.m. - 12:00 p.m.

    Join Blaine Rothauser to discover the many varieties of butterflies that might be found in the meadows of Willow Lake Farm.  A brief talk about meadow ecology will be followed by a natural history tour and adventure.  Bring a camera, binoculars and a note pad as we guarantee to introduce you to the other-worldly pleasures of the meadow.

  • The Great Adirondack Century Run

    July 9-12, 2015

    Time: Departing Four Mills Barn on Thursday, July 9, 2015 at 8:00 AM and returning Sunday, July 12, 2015 by 9:00 PM. Tour led by WVWA staff in rented van.

    Join WVWA’s Dennis Miranda and Jamie Stewart on a high octane, full throttle adventure of the Adirondacks. Explore the vast St. Regis River plains, discover the boreal forest of Bloomingdale Bog and reach the summit of Whiteface Mountain! Enjoy the quaint village of Lake Placid with their interesting stores and excellent restaurants.

  • Rain Barrel Workshop

    ​7:00 p.m. - 8:30 p.m.

    Purchase a professional, locally made, rain barrel from Camels Hump Rain Barrels.  Learn how to hook up and care for your rain barrel, retaining runoff and reusing the water in your garden!

    Rain barrels collect water that would normally flow directly off the roof through gutter down spouts and become storm water runoff. Retaining this runoff for garden use conserves water for plants during dry periods, saves the gardener time spent watering garden plants and provides a consistent supply of free soft (no chlorine, lime or calcium) water for outdoor use.


  • Evans-Mumbower Mill Open House & Ice Cream Social

    1:00 p.m. - 4:00 p.m.

    Take a break from the heat and join us for a cool treat and a tour of the water-powered gristmill.  

  • Berm is the Word - Stormwater and Stream Restoration Tour

    6:00 p.m.

    Join the WVWA on a walk and talk to a beautiful section of the Wissahickon Creek that was restored in 2012. We will talk about the state of the site prior to restoration and then visit the improvements made, including a berm for holding stormwater runoff from a nearby residential area. July is the perfect time to visit this site and see the native plants along the creek in full bloom.


  • Bird Banding Demonstration

    9:00 a.m. - 12:00 p.m.

    Come join WVWA Naturalist, Margaret Rohde, and see bird banding in action! Learn about avian conservation and research techniques, and find out what information can be collected by catching wild birds. You may even have the chance to release a bird from your hand! 

  • Family Creek Exploration

    10:00 a.m. - 12:00 p.m.

    Explore the Wissahickon Creek at the Four Mills Reserve.  Investigate how fast it flows and hunt for eddies, riffles and other stream features. Explore using nets, buckets and tools to find out what critters are living in our back yard.

  • Deer Exclosure Tour

    9:00 a.m. - 12:00 p.m.

    Join WVWA on a guided tour of deer exclosure sites.  The tour will focus on WVWA’s newest projects to understand one of the biggest threats to our biodiversity - deer herbivory. See two different examples, Crossways Preserve and Camp Woods, and learn how the projects were developed and how they are contributing to our mission of protecting and enhancing the Wissahickon Watershed. 

  • Wissahickon Excursion: Birding the Delaware Bayshore

    8:00 a.m. - 4:00 p.m.

    Join WVWA on a birding trip to the Delaware Bayshore, at a time when migration along the Atlantic Flyway is not to be missed! A place of astonishing biodiversity, the Delaware Bayshore provides opportunities to experience several habitats in a single day, from vast tidal wetlands and beaches to successional fields and upland forest.

  • A Healthy Wissahickon: We All Have a Part to Play

    7:00 p.m. - 8:30 p.m.

    Come to the Penllyn Woods Community building for a film showing the history of the Wissahickon Creek, the development of the Wissahickon Valley, and how it has affected our waterways! See how citizens and municipalities from all over the watershed are getting involved to solve these global problems, and join us afterwards for Q&A. Film created by GreenTreks.

  • Fall Mill Festival & Revoluntionary War Encampment

    1:00 p.m. - 4:00 p.m.

    Visit the Evans-Mumbower Mill and discover a Revolutionary War encampment. Experience camp life from historical reenactors dressed in full regalia. There will be plenty of family friendly hands on demonstrations, as well as a tour of the fully operational water-powered gristmill.

  • Walk on the Wild Side!

    All walks start at 8:00 a.m.

    Walk on the Wild Side offers a chance to experience the beautiful Green Ribbon Trail, a 21-mile trail that follows the Wissahickon Creek from North Wales and connecting with Fairmount Park’s Forbidden Drive.  Choose the length and pace of your walk (5, 8, 12 or the full 21 miles). All walks are guided and participants are bussed back to the starting point.

  • Ghost of Henry Mumbower & Pumpkin Painting

    5:00 p.m. - 6:00 p.m. - Pumpkin Painting
    6:00 p.m. - 8:00 p.m. - Ghost tours

    Don’t miss this slightly spooky but fun evening when old Henry Mumbower and his family revisit his Mill to see how it is operating today. Relax and roast marshmallows and enjoy some seasonal cider. Come early to paint your own pumpkin from 5-6pm.

  • Evans-Mumbower Mill Open House & Trail Walk

    1:00 p.m. - 4:00 p.m.

    After touring the Mill, take a walk along the former millrace that fed the mill, to locate the remnants of the dam in the Upper Wissahickon. The walk will begin at 2:00 pm and last approximately an hour. Please wear sturdy shoes or boots!