The Rules at Montour Preserve Bend for Exactly Two Fall Saturdays

If you register for the Humdinger Trail Races at Montour Preserve, the organizers will tell you, more than once, not to go looking for the start line ahead of time. The race begins near what locals call the pig barn, on a stretch of the Hopewell Park and Danville Borough Farm trail system that stays closed to the public every other day of the year. Scout it early and you risk the whole event, not just your own entry.

That single instruction says more about how Montour Preserve actually works than any brochure does. Most people who live near Danville think of the preserve as a fixed, permanent thing: eleven trails, a 165-acre lake, a fossil pit, open dawn to dusk, free every day. All of that is true. What's less obvious is that the preserve's rules aren't uniform across the calendar. A handful of fall weekends flip the switch on land, activities, and access that stay locked down the rest of the year. Understanding which weekends those are, and why, changes how you plan a fall visit here.

What "No Bikes, No Pets" Actually Rules Out

Start with the standing rules, because they explain everything downstream. Bikes aren't allowed on any of the trails circling Lake Chillisquaque, and pets aren't allowed anywhere on the property, a restriction race organizers repeat specifically for event days. Combined, those two rules mean a cyclist who wants to ride near Montour Preserve has exactly one legal option most of the year: the public roads that border the property, not the trail network inside it.

That's not a minor technicality. It's the reason the preserve's biggest fall event isn't a hike at all.

The four named trails that get the most foot traffic each run a different length and character:

These are the trails available to anyone, any day, on foot only. The interesting part of the fall calendar happens somewhere else.

The Chilli Challenge Turns Three Separate Activities Into One Course

The Montour Area Recreation Commission runs a race called the Chilli Challenge each fall, named for Lake Chillisquaque itself. It's described by the commission as the original event in what became its River Towns Race Series, and the format explains why it draws serious competitors rather than casual walkers: a single course that combines biking on scenic roads through Montour and Columbia counties, paddling the lake, and running the lakeside trails, back to back, in one continuous event.

Most preserve visitors do one of those three things on any given trip. Race day is the only time the property gets used as all three at once, and the team categories reflect how physically demanding that combination is. There are individual awards, two-person and three-person team divisions, and a four-person "Ironman" team category that takes home something called the Chilli Cup. Medical support on race day comes from Geisinger's Orthopaedics and Sports Medicine program, which tells you the organizers aren't treating this as a fun run. It's a genuine athletic event, staffed accordingly.

The Humdinger Runs Through Land You Can't Normally Reach

The second fall race, the Humdinger Trail Races, offers a roughly 8-mile course and a shorter option a little over 4 miles, both routed through the Hopewell Park and Danville Borough Farm trail system. Runners can pre-run most of the course in the weeks before the race. The exception is the section that matters most: the start and finish area, on land that stays off-limits to the public except on race day itself.

That's the detail worth sitting with. Somewhere along the edge of a trail network that Danville-area residents treat as fully public and fully known, there's a parcel that isn't either of those things. It borders the recreational land people walk every week, but it belongs to a working farm, and the only sanctioned way to set foot on it is to register for a race that happens once a year.

Both races are run by the same volunteer-led commission, the Montour Area Recreation Commission, that manages the preserve's parks, trails, and programming year-round. If you're weighing whether to build a fall weekend around either event, their race pages carry the current course details and registration windows directly.

What Stays Free and Open the Whole Time

The contrast matters because so much of the preserve doesn't work this way at all. The fossil pit, roughly an acre of exposed Mahantango Formation shale, is open to anyone, every day, no registration and no closures. The shale itself is close to 395 million years old, laid down during the Devonian Period when a shallow sea covered this part of Pennsylvania, and it's genuinely rich in fossils if you bring a small hammer and a bit of patience. It's the one part of the property where the answer to "can I go here" is always yes.

The Visitors' Center hours are the other piece worth knowing before you plan a fall trip. From May through September, it's open daily, 8 a.m. to 4 p.m. Starting October 1, the schedule shifts to Monday through Saturday only, same hours, which means Sunday access to the building itself goes away right as fall foliage season gets going. The trails and grounds stay open dawn to dusk regardless. It's just the indoor exhibits, trail maps, and staff assistance that follow the seasonal switch.

Reading the Fall Calendar Like Someone Who Lives Here

Put together, the pattern looks less like a random string of events and more like a property with two operating modes. Most weekends, Montour Preserve is exactly what it looks like: a quiet lake, a handful of trails, a fossil pit, open access, simple rules. On two specific Saturdays each fall, it temporarily becomes something else, a competitive course that borrows roads, water, and even a piece of farmland that isn't otherwise available to walk on.

For someone who already lives near Danville, that distinction is genuinely useful. If you're after a peaceful foliage walk on the Hummingbird or Wildlife Management trail, you'll want to check the race calendar first and pick a weekend that isn't one of the two race Saturdays, when parking near the preserve and access near Hopewell Park fill up fast. If you're the kind of person who wants to see land you can't normally reach, registering for the Humdinger is, as far as the rules go, your only path onto that stretch of borough farm ground.

Either way, it's the kind of detail that doesn't show up until you've spent real time paying attention to how a place like this actually runs, not just what it looks like on a map.

That's the same kind of attention we try to bring to the rest of Montour County, whether the question is which trail to walk this weekend or what a specific parcel near Danville is actually worth. If you're weighing a move in the area, or just curious what your own property looks like in today's market, our Montour County neighborhood page and free home valuation tool are both good places to start. CENTURY 21 Mertz & Associates has been working this part of the Susquehanna Valley long enough to know which rules are permanent and which ones only apply two Saturdays a year.