Water reaches the Cold Spring Harbor Fish Hatchery from the Upper Spring Pond and six artesian wells at a steady 52°F all year. The springs supply 50 to 75 gallons a minute and the wells another 325. There are no pumps. Underground pressure and a slight slope across the grounds keep the water moving through the trout ponds.
With the water the same in every month, the fish set the calendar. On the property at 1660 Route 25A, the season runs on the brook trout's fall spawn. Eggs are stripped and fertilized in November and hatch in late December, and in 2026 the hatchery's public demonstrations fall on the weekends between those two points.
Brook Trout Set the Date
The hatchery raises several kinds of trout. Brook trout and rainbow trout are both for sale, and the Robert Koenig Memorial Pond, dedicated in September 2001, holds brown trout and water lilies. The eggs, though, come from one place. The hatchery takes its own brook trout eggs from broodstock raised on site.
That explains November. The New York State Department of Environmental Conservation's fish guide lists brook trout spawning from September through December, brown trout in October and November, and rainbow trout in March and April. The hatchery's school programs use a seasonal window of late October through mid-November for egg taking.
The hatchery calls egg taking and fertilization a "centuries-old technique of fish breeding." Through its work with Trout in the Classroom, it also brings Egg Stripping programs into schools. Raising and stocking trout is what the site has always done. It closed as a New York State fish hatchery on March 31, 1982, and reopened the next day as a nonprofit educational center run by the Friends of the Cold Spring Harbor Fish Hatchery, Inc., which still raises and stocks trout today.
The Demonstrations Left This Month
The all-day Hatchery Egg Take was held on November 3. These public sessions remain, and each lasts about half an hour:
| Date | Time | What's listed |
|---|---|---|
| Sunday, Nov. 8 | 1:00 to 1:30 p.m. | Egg Taking Demonstration |
| Saturday, Nov. 14 | 1:00 to 1:30 p.m. | Egg Taking Demonstration |
| Saturday, Nov. 21 | Confirm with the hatchery | Egg Taking Demonstration |
| Saturday, Nov. 28 | 3:00 to 3:30 p.m. | Egg Taking Demonstration |
| Sunday, Nov. 29 | 1:00 to 1:30 p.m. and 3:00 to 3:30 p.m. | Egg Taking Demonstration |
The hatchery's own pages give two different times for November 21. The event detail page says 1:00 to 1:30 p.m., and the calendar view says 11 a.m. to noon. Call ahead at (516) 692-6768 before planning around that one.
That same Saturday, "Craft Time – Decorate a Ceramic Turkey" offers 11 a.m. and noon sessions. It costs $6 for members and $11 for non-members, and registration is required. The hatchery is open every day from 10 a.m. to 5 p.m. and closes on Thanksgiving Day and Christmas Day. Admission is $7 for adults, $6 for ages 65 and up, $5 for ages 3 to 12, and free for members and children 2 and under.
What Happens to the Eggs After the Demo
The hatchery's live exhibits page lays out each stage:
- Hatch House, early November. The eggs are kept here, protected from hungry predators and sunlight.
- Hatching, late December. The eggs taken in early November hatch around the holidays.
- About four months indoors. The young trout stay in the Hatch House for about four months, or until they are moved to the rearing pools.
- Rearing pools. These serve as a middle step between the troughs in the Hatch House and the outdoor ponds, giving young trout room to grow.
- Trout Ponds, within the year. The fish move to the large outdoor ponds. Signs on each pond list the species and the month it hatched, and nets overhead keep herons and ospreys away.
The pond signs mean the year's cycle is on view during any visit. A fish hatched last winter is labeled with its month, and so is one from the year before. The Walter L. Ross II building adds more than 30 species of freshwater fish native to New York, from the bowfin to the native Long Island brook trout. The hatchery says it holds the largest living collection of New York State freshwater reptiles, fishes and amphibians.
Down Main Street, a Museum on a Thursday-to-Sunday Clock
The Cold Spring Harbor Whaling Museum at 301 Main Street works on a tighter schedule. Its fall and winter gallery hours are Thursday through Sunday, 11 a.m. to 4 p.m. Admission is $8 for adults and $6 for seniors and for children ages 4 to 17. Members, children 3 and under, and active military with ID get in free. Last entry is at 3:30 p.m.
This is the museum's 90th year. The Whaling Museum Society was founded in 1936. To mark the anniversary, new members who join between October 1 and December 31 get 90 extra days of membership. The anniversary first showed up in March, when Huntington Now reported free admission for anyone named Robert or Roberta, a nod to founder Robert Cushman Murphy.
The November programs on the museum's events calendar take place while the hatchery is taking eggs:
- Thursday, Nov. 12, 6:30 p.m. Crafts & Cocktails: Corn Husk Figures, served with an apple-infused "Golden Harvest" cocktail or mocktail. $35, or $25 for members.
- Sunday, Nov. 15, 1 p.m. and 3 p.m. Pickle Party! Pickle-Making Workshop & Tasting, timed to National Pickle Day and built around what whalers ate at sea. $15 plus admission, or $10 for members.
- Wednesday, Nov. 18, 6:30 p.m. Beyond the Book: Gales of November, a discussion of John U. Bacon's book on the 1975 sinking of the Edmund Fitzgerald. Free for members and for patrons of the Cold Spring Harbor, Huntington and South Huntington libraries. $15 for everyone else.
The book talk is a Wednesday evening event, so it happens on a night the galleries are normally closed. The museum is also closed on Thanksgiving, November 26.
The Week the Eggs Hatch
Late December is when the two calendars line up most closely. The hatchery's November eggs hatch then, and the museum adds days. Its library-pass page lists closures on December 24 and 25 and extra school-break openings December 28 through 30, a Monday-to-Wednesday stretch the galleries usually skip. The December programs fill those days:
- Thursday, Dec. 10, 6:30 p.m. Crafts & Cocktails: Cookie Decorating. $35, or $25 for members.
- Saturday, Dec. 12, noon to 2 p.m. Sea Glass Ornament Workshop drop-in. Admission plus $10, or $5 for members.
- Sunday, Dec. 27, noon to 2 p.m. Needle Felted Penguins drop-in, with a hot cocoa bar. Admission plus $10, or $5 for members.
- Tuesday, Dec. 29, noon to 2 p.m. Candle Dipping Workshop drop-in, which includes a look at whale blubber and oil from the collection. Admission plus $10, or $5 for members.
- New Year's Eve, Dec. 31, 11 a.m. to noon. Nautical New Year, a countdown to 12 noon based on the old nautical timekeeping tradition behind the New Year's Eve ball. Included with admission.
The hatchery stays open every day of that week except Christmas Day. Before then, it holds its Tree Lighting Ceremony on Saturday, December 5, from 5 to 7 p.m. For a quieter stop, the Cold Spring Harbor Library is showing The Art of Marie Sheehy-Walker from November 2 through January 5, 2027, during library hours.
Three Outings Built Around the Fish
Each of these pairs a scheduled program with a hatchery visit and leaves room before the museum's 3:30 p.m. last entry.
Saturday, November 14. Get to the hatchery before the 1:00 p.m. demonstration and walk the Trout Ponds first so the pond signs make sense. After the half-hour session, head to 301 Main Street with time left for the galleries.
Saturday, December 12. Start with "Craft Time – DIY Wooden Binoculars" at the hatchery, 11 a.m. to noon, at $6 for members and $10 for non-members. The Whaling Museum's Sea Glass Ornament drop-in begins at noon and runs until 2 p.m., so the second stop opens just as the first one ends.
Tuesday, December 29. Most weeks the museum is closed on Tuesdays, but this week it's open for school break, with Candle Dipping from noon to 2 p.m. Go to the hatchery afterward and stop by the Hatch House, where November's eggs were due to hatch in late December.
If you'd like help planning more weekends like these around Cold Spring Harbor, or want to know how the hamlet's calendar changes through the seasons, Kate Works is glad to share what she knows about the North Shore one season at a time. Start your Long Island home search whenever you're ready, and come see the trout first.
