Hunt unit · Assabet River National Wildlife Refuge

North Unit B Hunt Unit Map & Access

Special regsPermit required

The North Unit B unit is one of 6 mapped hunt units on Assabet River National Wildlife Refuge in Middlesex County, MA. It covers approximately 520 acres and is listed as “open – special regulations apply” for 2026–2027. That means hunting is permitted, but refuge-specific rules — such as limited species, dates, weapon types, access methods or quota permits — apply on top of state regulations. A refuge permit is required.

Navigate to unit Refuge overview Official hunt info ↗
520acres
Special regsstatus 2026–27
Yesrefuge permit
Middlesex Countycounty

North Unit B map

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OpenSpecial regulationsClosedFWS-owned landWPA (public)Refuge boundaryEasement (private) Tip: switch to Satellite or USGS Topo in the layer menu · click the map for GPS coordinates
Downloads (whole refuge):KMLGPX

Rules & permits for this unit

Status: Open – special regulations apply

Hunting is allowed, but refuge-specific rules apply in addition to Massachusetts regulations. Typical special regulations include limited species or seasons, quota/lottery permits, weapon restrictions (e.g. archery or shotgun only), shooting-hour limits, blind or stand rules and restricted access.

Refuge permit required. Type: Other OMB-Approved Permit. Obtain via: Online Other.

permit required for all hunting opportunities

Game at Assabet River NWR

Species listed for the refuge as a whole — a special-regulation unit may be limited to certain species. Confirm in the hunt brochure.

Getting to the North Unit B unit

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Destination: center of the North Unit B unit

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Decimal
42.41121, -71.49186
DMS
42°24′40.4″N 71°29′30.7″W

Nearest towns

  • Worcester, MA19 mi NE of town
  • Boston, MA22 mi W of town
  • Manchester, NH40 mi S of town

Straight-line distances. Driving routes are longer; many refuge roads are gravel and may close seasonally.

The navigation point is a point inside the unit polygon, not necessarily a parking area or legal access point. Use satellite view to find roads, gates and designated parking, and respect closed areas and private inholdings.

Shooting hours at this unit

Today at North Unit B

Legal light*–
Sunrise–
Sunset–

*½ hour before sunrise — the standard federal shooting-hour start for migratory game birds. Times in New York local time.

Full season calculator →

2026–2027 season sun table

DateShooting lightSunriseSunsetDaylight
Tue, Sep 1, 20265:40 AM6:10 AM7:22 PM13h 13m
Tue, Sep 15, 20265:54 AM6:24 AM6:58 PM12h 34m
Thu, Oct 1, 20266:11 AM6:41 AM6:29 PM11h 48m
Thu, Oct 15, 20266:27 AM6:57 AM6:05 PM11h 09m
Sun, Nov 1, 20265:48 AM6:18 AM4:40 PM10h 23m
Sun, Nov 15, 20266:06 AM6:36 AM4:25 PM9h 49m
Tue, Dec 1, 20266:25 AM6:55 AM4:15 PM9h 20m
Tue, Dec 15, 20266:38 AM7:08 AM4:14 PM9h 06m
Fri, Jan 1, 20276:45 AM7:15 AM4:22 PM9h 08m
Fri, Jan 15, 20276:42 AM7:12 AM4:36 PM9h 24m
Mon, Feb 1, 20276:30 AM7:00 AM4:57 PM9h 57m

Computed for 42.411, -71.492 (EDT / DST-aware). Check state rules — big game hours vary.

Weather forecast

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Forecast from the National Weather Service. Wind direction matters — plan your approach downwind of where game beds.

Other units at Assabet River NWR

UnitStatusAcresPermit
North Unit ASpecial regs1,332Required
South UnitSpecial regs298Required
Unit CSpecial regs123Required
ClosedClosed4.1Required
Safety ZoneClosed80Required

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