🌤 Weather at Fort Halifax State Historic Site by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 20–66 °F | 53–80 °F | 29–72 °F | 9–34 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Waterville Trtmt Plt, 2 mi away, elevation 73 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
Maine’s Oldest Blockhouse — 1754 French & Indian War Fort at Kennebec-Sebasticook Confluence, Oldest Surviving Original Wooden Blockhouse in America, Winslow Waterfront
Fort Halifax State Historic Site is a state historic site in Winslow, Kennebec County, Maine, at the confluence of the Kennebec and Sebasticook Rivers. The site preserves the oldest surviving original wooden blockhouse in America — built in 1754 during the French and Indian War by Massachusetts Governor William Shirley to defend against French and Native attacks on the Kennebec frontier — with interpretive signage, a waterfront park, picnic area, and scenic river views.
Fort Halifax’s 1754 blockhouse holds an extraordinary distinction — it is the oldest surviving original wooden blockhouse in the United States. Built by order of Massachusetts Governor William Shirley during the French and Indian War, the fort guarded the strategically vital confluence of the Kennebec and Sebasticook Rivers. It served as a northern outpost protecting English settlements from French and Abenaki attacks. When the 1987 flood swept the blockhouse downstream, volunteers recovered the original timbers from the Kennebec River and meticulously reconstructed the structure using the same 18th-century logs. Today the blockhouse stands in a riverside park at the scenic two-river confluence.
Things to Do
Historic Site
- 1754 blockhouse — oldest original in America
- Interpretive signage
- French & Indian War history
- 1987 flood recovery story
Waterfront Park
- Kennebec + Sebasticook confluence views
- Picnic area
- Photography
- Walking paths
Park Information
| Feature | Details |
|---|---|
| Location | Winslow, ME — Kennebec/Sebasticook confluence |
| Built | 1754 — French & Indian War |
| Distinction | OLDEST original wooden blockhouse in America |
| Builder | Gov. William Shirley (Massachusetts) |
| Purpose | Northern defense against French/Abenaki |
| 1987 Flood | Swept away → original timbers recovered + rebuilt |
| Season | Year-round (exterior); check for interior hours |
| Admission | FREE |
| Facilities | Picnic area, parking, paths |
| Camping | NOT available |
| Coordinates | 44.5517° N, 69.6258° W |
Best Time to Visit
| Season | Highlights | Considerations |
|---|---|---|
| Summer (Jun–Aug) | ⭐ BEST: Full access; river views; picnicking; long days; combine with Waterville | Popular; warm |
| Fall (Sep–Oct) | Foliage at river confluence; dramatic light; photography; quiet | Cooler; shorter days |
| Spring (Apr–May) | Snowmelt rivers; birding; quiet; green-up | Muddy; river may be high |
| Winter (Nov–Mar) | Snow-covered blockhouse; solitude; open year-round | Cold; no winter maintenance; ice |
Visitor Tips
- OLDEST in America: Fort Halifax’s blockhouse is the oldest surviving original wooden blockhouse in the United States — built in 1754 with original 18th-century logs.
- Flood miracle: The 1987 flood swept the blockhouse into the Kennebec River — volunteers recovered the original timbers and painstakingly rebuilt it.
- Two rivers: The site overlooks the scenic confluence of the Kennebec and Sebasticook Rivers — beautiful at all seasons.
- Free: No admission fee — the exterior and park are accessible year-round.
- Combine: Just across the river from Waterville — combine with Colby College campus and downtown dining.
Frequently Asked Questions
Wildlife & Nature
Fort Halifax SHS — preserves the oldest blockhouse in the United States (1754) — built during the French and Indian War. The original hand-hewn timbers were recovered after being swept away in the 1987 flood and reassembled. The site’s Kennebec-Sebasticook confluence supports bald eagles, osprey, and alewives (massive spring fish runs).
Nearby Attractions
Winslow — adjacent. Waterville — across the river. Augusta — 15 miles south.
What is the oldest blockhouse in America?
Fort Halifax State Historic Site in Winslow, Maine, preserves the oldest surviving original wooden blockhouse in the United States, built in 1754 during the French and Indian War. It guards the confluence of the Kennebec and Sebasticook Rivers. In 1987, a flood swept the blockhouse downstream, but volunteers recovered the original 18th-century timbers and rebuilt the structure. The site is free and includes a waterfront park with picnic area and river views.
Last updated: May 2026
Keep exploring: The closest neighbors are Kennebec Highlands (a short drive away) and Lake St. George State Park (within about an hour’s drive).
🐾 Dogs & Pets at Fort Halifax State Historic Site
- Pets allowed? statewide rule
- Pets are allowed at most Maine state parks year-round, including trails, but must be leashed, under the handler's physical control and never left unattended.
- Leash rule statewide rule
- Leash not exceeding 4 feet, under the physical control of the handler
- Beaches & swim areas statewide rule
- Pets are not allowed on state park beaches April 1 through September 30; leashed pets are welcome on beaches October 1 through March 31
- Statewide exceptions statewide rule
- No pets allowed at Sebago Lake State Park campground; park staff may assign pet owners to less congested camping areas
Are dogs allowed at Fort Halifax State Historic Site?
Pets are allowed at most Maine state parks year-round, including trails, but must be leashed, under the handler's physical control and never left unattended. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via maine.gov. More: Maine state parks guide · Dog rules in all 50 states compared
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