Ask a longtime Pocantico Hills resident when to bring visiting family to see the Chagall windows and most will tell you the same thing: check the church's calendar first, because it isn't the same calendar all year. The Union Church of Pocantico Hills, which houses nine Marc Chagall windows and Henri Matisse's final commissioned work, doesn't run on a simple open-season, closed-season schedule. It runs on three different schedules stacked back to back, and the version that opens on September 5 only lasts twenty-three days before it changes again.
That detail sounds like trivia. It isn't. Read alongside the schedules at Stone Barns Center for Food & Agriculture and Rockefeller State Park Preserve during the same period, the church's booking calendar helps show how local activities overlap in September.
Union Church's Seasonal Tour Schedule
Here's the pattern, pulled straight from Historic Hudson Valley's own visitor schedule for the Union Church, which operates the self-guided window tours:
| Window | Tour Days | What Changes |
|---|---|---|
| July 4 – Aug 29 | Saturdays only | One chance a week to see the windows |
| Sept 5 – Sept 27 | Saturdays and Sundays | Weekend flexibility returns |
| Oct 1 – Nov 1 | Thursday through Sunday | Four days a week, including Saturdays during Sleepy Hollow's ticketed Halloween season |
The shift from a single Saturday slot in summer to a full weekend in September looks like an expansion, and it is. In October, the tour days expand to Thursday through Sunday, including during Sleepy Hollow's ticketed Halloween operations at the cemetery and Philipsburg Manor.
The September 5–27 tour window includes four weekends, ending with September 26–27, the last weekend under the September schedule.
One more friction point worth knowing before you plan around this: Historic Hudson Valley doesn't sell Union Church tickets at the door. They have to be bought in advance online or at the Philipsburg Manor Visitor Center, so a same-day decision to swing by won't work the way it might at Stone Barns.
The Farm Runs On A Different Kind Of Discount
Stone Barns Center for Food & Agriculture, tucked into 80 acres that used to belong to the Rockefeller estate and bordered on three sides by the Preserve, has its own rhythm, and it rewards people who visit on purpose rather than on impulse. Weekend admission runs $20 per vehicle from May through November. Wednesday through Friday, parking is free. It's also free on the days of the center's monthly market, when the farm sells its own produce, pasture-raised meat, and cut flowers alongside goods from other Hudson Valley producers.
That means the cheapest way to spend a September afternoon at Stone Barns isn't the weekend visit most out-of-towners default to. It's a weekday trip, or timing your visit to the market itself. One note for anyone showing up without a plan: the farm doesn't take cash. Payment runs through Apple Pay, credit, or debit only.
This September carries one more reason to go. On Saturday, September 26, Stone Barns is hosting a woodland walk led by mycology expert Lindsey Jerome, an hour spent learning to spot the fungi that quietly do a lot of the ecological work in the fields and forest around the farm. It runs from 11 a.m. to noon, and it happens to fall on the same weekend, September 26 and 27, that closes out the Union Church's expanded weekend tour window. A Saturday morning walking Stone Barns' woodlands followed by a Sunday afternoon under the Chagall windows is a genuinely local way to spend the last full weekend before the calendar resets on October 1.
Visiting Rockefeller State Park Preserve in September
Rockefeller State Park Preserve, the 1,771 acres the Rockefeller family began donating to New York State in 1983, has its own version of the same pattern. The 45 miles of carriage roads that wind past Swan Lake and through the Rockwood Hall section, where the old William Rockefeller estate's stone walls and terraces still stand along the Hudson, are busiest on weekend afternoons and quietest on weekday mornings all year round. But there's a seasonal layer on top of that daily one. Foliage peaks around mid-October, and parking at the Preserve fills up fast during that window, particularly on weekends.
September falls before the mid-October foliage peak. A weekday morning walk through Rockwood Hall this month, past the demolished mansion's remaining stonework and out toward the river view, offers a quieter option than a weekend afternoon, when the Preserve is busiest.
Putting The Weekend Together
If you're mapping out the last few weekends before Pocantico Hills' calendar shifts toward its busier fall footing, here's what actually lines up:
- Weekday mornings through late September: a quieter time to visit the Preserve, before the mid-October foliage peak
- Wednesday through Friday, any week: free parking at Stone Barns, unlike the $20-per-vehicle weekend admission fee
- Saturday, September 26, 11 a.m.: the mycology walk with Lindsey Jerome at Stone Barns
- Weekend of September 26–27: the final weekend before the Union Church's tour schedule changes to Thursday through Sunday on October 1
- Before you go: buy Union Church tickets in advance online or at the Philipsburg Manor Visitor Center, since none are sold at the door
If you're bringing guests who also want to see Kykuit, know before you plan the day that it runs on its own separate reservation system through the National Trust for Historic Preservation, distinct from the Union Church tickets handled by Historic Hudson Valley. Two Rockefeller-era sites, a few hundred yards apart, two different booking calendars. It's the kind of thing you only learn by living here long enough to have gotten it wrong once.
Why This Window Matters
Each calendar offers a different way to plan a September visit. Union Church has weekend tours from September 5 through 27, Stone Barns has free parking Wednesday through Friday and a woodland walk on September 26, and weekday mornings offer a quieter option at the Preserve. Together, the schedules make it possible to plan several local stops around the final September weekend before the Union Church schedule changes on October 1.
Neighborhoods like Pocantico Hills reward the kind of attention that comes from actually living somewhere, not from checking a map once. If you're weighing whether this is the kind of place you want to put down longer roots, whether that's a starter home near the Preserve or something with more room to grow into, the Aloia Stroub Team can talk you through what's currently on the market here and what week-to-week life is really like once you move in. Reach out for a straightforward conversation, or request a free home valuation if you're curious what your own place might be worth right now.
