The Grotto
By Armen Suny · Last verified Sep 2026
LiDAR & 3D terrain
Photo Credits (5)
Difficulty
Easy
Trail Length
1.0 miles
Trail Type
Out And Back
About The Grotto
The Grotto is a small, picturesque waterfall tucked into the woods of the Wissahickon Valley in Pennsylvania. Nestled on county-owned land and managed by the county, the falls are framed by unique rock formations and moss-covered boulders that create a serene, photogenic pocket of rippling water and lush greenery. It’s a favorite spot for nature lovers and photographers seeking a quiet, intimate streamside setting. Access is via a moderate out-and-back hike that rewards visitors with close-up views of the grotto and its layered stone walls. The site sits within the Wissahickon Valley land unit (designation LP) and is maintained by the county, so expect a natural, forested experience rather than developed infrastructure. Plan for a short hike and bring a camera — the light and textures around the falls make for great shots year-round.
The Setting
The Grotto sits at 279 feet within Wissahickon Valley, fed by the Wissahickon Creek, in the coastal lowlands of Pennsylvania.
Trail & Hike Details
Trail Description
The trail to The Grotto is a 2.4-mile out-and-back with roughly 350 feet of elevation gain and is rated moderate. The route follows a forested path that can be uneven in places, passing through mossy, shaded terrain before arriving at the small waterfall and rocky amphitheater. The walk is generally accessible to most hikers who can handle moderate grades and natural surface trails; there is no USFS trail number or official federal trail classification associated with this county-managed route. Expect natural footing and occasional roots and rocks—sturdy footwear is recommended.
What to Expect
Dogs are welcome.
Accessibility
The trail is not wheelchair accessible. Uneven terrain and elevation changes require steady footing.
Frequently Asked Questions
🐶 Are Dogs Allowed at The Grotto?
✅ Dogs are allowed
Are There Any Fees or Permits Required?
🆖 No fees required
🏊 Is There Swimming at The Grotto?
❌ Swimming is not allowed
When to Visit
Spring and early summer are ideal times to visit, as the waterfall flow is typically stronger due to seasonal rainfall.
Seasonal Access
The best time to visit is Spring, Summer, and Fall. Winter access may be limited.
Safety Information
Exercise caution on wet or slippery rocks near the waterfall. Be aware of ticks and other insects in the area. Always stay on marked trails to avoid getting lost.
Current Water Conditions
816 ft³/s
Current discharge — how much water is flowing
Much higher than usual for this time of year
Based on 60 years of record
3.63 ft
Water depth at gauge
61°F
CoolRefreshing for swimming
7-Day Discharge Trend
What does this mean for your visit?
The water is flowing much higher than usual, expect an impressive display. Water temperature is a refreshing 61 degrees F, good for a quick swim. Expect murky visibility with reduced clarity and excellent dissolved oxygen levels. PH is normal at 7.8 and mineral content is typical.
Water Quality
Dissolved Oxygen
ExcellentSupports aquatic life
pH
NormalWithin healthy range (6.5-8.5)
Water Clarity
MurkyReduced visibility
Conductance
Dissolved minerals in the water
About This Gauge
7-Day Flow Outlook
Based on the USGS gauge Wissahickon Creek at Mouth, Philadelphia, PA (6 km away).
Today
Roaring
881 cfs
6/10Tomorrow
Roaring
867 cfs
9/10Tue
Roaring
763 cfs
9/10Wed
Roaring
745 cfs
9/10Thu
Roaring
798 cfs
9/10Fri
Roaring
805 cfs
6/10Sat
Roaring
834 cfs
6/10Best window: Tomorrow — roaring flow, mostly sunny (trip score 9/10).
Best time of year: this gauge typically runs highest from mid February to late April, peaking in March.
How we calculate this
This is a transparent outlook, not a precise forecast. We take the waterfall's current flow strength (how it ranks against its historical normal for today, from the nearest USGS stream gauge), carry that ranking forward along the gauge's seasonal curve, and nudge it for forecast rain. Confidence is highest for the next day or two and falls further out. Always check official conditions and your own judgment before visiting — high flows can be dangerous.
Know when to go.
Get a free email alert when waterfalls near Wyndmoor hit peak flow. We only send when conditions are worth the trip — no weekly newsletters, no spam.
Weather Forecast
The Terrain, Seen by LiDAR
Aircraft-mounted lasers measured this ground to within inches. Trees and buildings are digitally stripped away, leaving the bare shape of the land the water has carved.
1-meter lidar shows the creek losing roughly 51 feet through The Grotto over a long run of ledges. Elevation at the pin is about 280 feet.
The ground changes about 37 feet in the 500 feet above the falls and 48 feet in the 500 feet below. The falls face northwest and stay mostly shaded, with soft, even light all day.
Drag to compare. The dot marks the waterfall. The frame is about a mile across.
- Ground elevation
- 280 feet
- Measured by 1-meter lidar
- Drop at the falls
- About 51 feet
- Change in ground height within ~250 feet of the falls
- Faces
- Northwest
- Mostly shaded, so the light stays soft and even all day.
A slice through the lidar ground surface, from above the falls to downstream (heading northwest).
Elevation data: USGS 3D Elevation Program. Aerial imagery: USGS The National Map. Public domain.
Location & Access
Getting There
The Grotto is located within the Loyalsock State Forest in Pennsylvania. Access typically involves driving to a nearby parking area and hiking a short trail to reach the waterfall.
Get Directions on Google MapsParking
Parking is available at designated trailheads within the Loyalsock State Forest. Visitors should check local maps or signage for the nearest parking area.
Hours
Elevation
279 feet above sea level
Coordinates
40.065111° N, -75.197955° W
Land Management
Managed by CNTY
Visitor Tips & Gear
Wear sturdy shoes as the trail may be uneven or muddy, especially after rain. Bring insect repellent during warmer months. Arrive early to avoid crowds, especially on weekends.
Where to Stay
Holiday Inn Express & Suites Ft. Washington - Philadelphia by IHG
Hampton Inn Plymouth Meeting
Hilton Garden Inn Philadelphia-Fort Washington
Hampton Inn Philadelphia/Willow Grove
Browse vacation cabins and private rentals nearby
Unique outdoor stays — tents, yurts, and treehouses
Rent a campervan or RV for your waterfall road trip
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Additional Information
Nearby Attractions
Other attractions in the Loyalsock State Forest include the Haystacks Rapids and the Loyalsock Trail, which offers additional hiking opportunities.
Wildlife
The area is home to various wildlife, including deer, birds, and small mammals. Visitors may also see a variety of native plants and wildflowers.
Cities near The Grotto
Nearby Waterfalls
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