Most Saturday mornings, the meadow at Rolling Hill Park fills up fast. Dogs off leash in the permitted area, a few blankets spread near the tree line, someone always throwing a frisbee toward the ridge. If you live in Gladwyne and you've been to this park, this is almost certainly the park you've been to. The open field at the top of the hill, maybe a loop around the edge, back to the car.
That's the park most people know. It is not the park that's actually there.
The Part of the Park Most People Never Leave
Rolling Hill Park sits at 1301 Rose Glen Road on 103 acres that Lower Merion Township bought in 1994. The top of the property, the part visible from the parking lot, is the meadow and the off-leash dog area that earned the park a Best of Philly nod from Philadelphia Magazine back in 2014 as a suburban dog park. It's a legitimate reason to visit on its own. The dog park requires a permit through the township, and there are both on-leash and off-leash zones, which is worth knowing before you let a dog run.
But the meadow is maybe fifteen percent of the property. The other eighty-five percent is downhill, in the woods, along a creek, and almost nobody who parks at the top ever walks down to see it.
What's Actually Fifteen Minutes Down the Hill
Follow the blue trail down toward Mill Creek and the park changes character entirely. The woods get deeper, the slope gets steep enough that the township installed steps in a few places, and eventually you reach stone. Not landscaping stone. Ruins.
There are two distinct sites. One is what's left of housing built by a mill owner named Samuel Lehman Smith sometime between 1837 and 1840, with a root cellar still visible nearby. Downstream, closer to what was once the Barker Mill, are two more structures: a single unit that likely housed one family or a handful of workers, and a double unit built for two families, both with intact stonework, heavy fireplace lintels, and attached kitchens. Those two date to the first quarter of the 19th century, which makes them older than almost anything else standing in Lower Merion.
The trails down here aren't always official. Several unmarked paths also lead to the creek, and the township asks visitors to stay on marked trails specifically because the ground cover in this section is fragile and erodes quickly once people start cutting their own routes. If you're bringing a dog or kids down this way, budget more time than the meadow requires. This is a real hike, not a stroll around a field.
Before It Was a Park, It Was Three Welsh Land Grants and Two Mills
The reason there's an 1830s mill worker's cottage at the bottom of a Gladwyne dog park traces back to William Penn. The land that became Rolling Hill Park originated as three separate parcels granted to Welsh patent holders: John Roberts, Robert Jones, and Richard Harrison. Roberts, who was himself a miller, ended up holding two of the three parcels, and two of the tracts had corners crossing Mill Creek, which meant fast, reliable water for turning a wheel.
Frederick Bicking built a paper mill on the western end of the property by 1762. By the end of the 19th century, that site had evolved into a textile mill under the Nippes name. These were not large operations. Federal census records from 1850 show the Mill Creek area populated mostly by laborers, mill workers, and local craftsmen, and each mill likely employed somewhere between six and ten people, who were housed on site in the tenement buildings whose ruins you can still find today.
Then a Sun Oil Grandson Turned It Into a Gentleman's Farm
By the 1880s, farming near Philadelphia had stopped paying for itself, and the arrival of the Philadelphia and Reading Railroad stop at Rose Glen made the commute from the Main Line into Center City easy enough that land here started shifting from working farms to what were called gentleman's farms, properties where the income came from somewhere else entirely.
That's the phase Walter C. Pew, grandson of the founder of Sun Oil, bought into. He renamed the property Rolling Hill Farm and expanded it into a suburban estate, adding tennis courts and a swimming pool designed by Thomas Sears, a grounds designer based right there in Gladwyne. Pew and his family lived on the property until the 1950s. By 1958 the main house sat unoccupied, and while it was being dismantled that year, a blowtorch set it on fire. What remained was demolished, and the Pews never returned to the site. The caretaker kept living in the cottage regardless.
How Nine Hundred Families Turned an Estate Into a Park
When the Pew estate came up for sale in 1994, there was an immediate push within the township to keep it as open space rather than see it subdivided. The purchase came together through a combination of Montgomery County open space funds, a township bond issue, and direct contributions from the community, coordinated by the Lower Merion Preservation Trust. More than 900 individual families ended up donating toward the $4.37 million purchase price. That kind of grassroots funding is part of why the park carries a National Register Historic District designation today, and why the stone ruins are being actively stabilized rather than left to collapse, an ongoing effort led by the township's Board of Commissioners.
The Cottage Still Runs Programs, Just Not as Headquarters
The 1895 caretaker's cottage on the property, originally built for a caretaker working under a later owner named Megargee, became the next preservation project. The newly formed Lower Merion Conservancy raised money to restore it starting in 1997, finished the work by May 2000, and used the cottage as its headquarters for the next two decades. In 2021, the Conservancy relocated to the Barnes Administration Building through a partnership with Saint Joseph's University.
The cottage didn't go quiet after that. It still hosts Conservancy programming on site, including events like a Family Astronomy Night built around a planetary alignment, where an outreach coordinator from the Rittenhouse Astronomical Society and telescope operator at the Ryan Observatory gave a talk at the cottage before leading the group up to the top of the park for telescope viewing and a bonfire. If you've only ever associated this park with dogs and open grass, its old headquarters building is still doing double duty as a small community classroom.
If You're Walking It This Month
Early fall is a good stretch to finally take the blue trail down. The creek is low enough to get close to without much mud, the tree cover along Mill Creek is starting to turn, and the worst of tick season in the meadow grasses is easing, though bug spray is still a reasonable idea if you're heading into the woodland sections. One trail note worth flagging before you go: a separate network called the Bridlewild Trail overlaps part of the park's edges and is maintained privately by a group of donors rather than the township, and some sections are closed to public use while others aren't clearly marked either way. Read the signage carefully rather than assuming every path down here belongs to the park proper.
If you've lived in Gladwyne for years and only ever known the meadow, the ruins are the kind of thing that changes how you think about a place you walk past all the time. The park's real story was never really about the grass at the top. It's about what survived at the bottom, and the fact that a neighborhood decided, twice now, that it was worth keeping.
For more on what makes this stretch of the Main Line worth paying attention to, from its parks to its property market, the Damon Michels Team is always glad to talk through what's happening in Gladwyne, whether you're a longtime neighbor or just getting to know the area. Reach out anytime you have a question about the neighborhood or the market around it.
