On October 1, the seasonal Wetland Trail at the Tualatin River National Wildlife Refuge closed for the winter. It's easy to read the closed gate as the end of the refuge's good months. The U.S. Fish and Wildlife Service says the opposite: the trail closes to protect wintering waterfowl, and those birds are arriving now.
So the months when the refuge sees the most people on its trails are not the months when it holds the most wildlife. The trail is open May 1 through September 30. A 2006 refuge brochure puts the largest bird numbers between October and May, which is almost exactly the stretch when the trail is closed. If you only know the refuge on Pacific Highway as a summer walk, you have probably seen its quietest version.
Summer grows the food that winter eats
The closure makes more sense once you look at the refuge's calendar as one cycle. In spring, the seasonal wetlands dry out and leave mudflats that feed shorebirds passing through on their way north. Over the summer, wetland plants like water plantain and smartweed grow in those drying basins. USFWS describes those plants as food for the waterfowl that arrive later in the year.
Then the rains come back. USFWS says that as temperatures cool, Arctic-nesting birds come down from their northern breeding grounds looking for open water, food and shelter. Bald eagles start showing up regularly around the same time to hunt the growing flocks. By winter, cackling Canada geese, northern pintail and mallards "blanket the refuge," in the agency's words, feeding on the seeds and plants that grew over the summer.
Seen this way, the summer trail season is the growing season. The wetlands visitors walked past in August were producing the food supply for the months ahead, and the October 1 closure is when that food supply gets used.
A buildup through the season
Fall migration at the refuge isn't one big arrival day. It builds over months, and the sources point to a sequence more than a single peak:
- Late summer: smartweed and water plantain mature in the seasonal wetlands.
- Fall rains: Arctic-nesting waterfowl begin arriving, and bald eagles become regular visitors.
- December into January: the Friends of the Refuge field guide says Canada geese start arriving in Oregon by December, with most showing up in January. It describes them as abundant at the refuge through fall and winter.
- Mid-winter: USFWS reports an average of 20,000 waterfowl on the refuge at mid-winter.
The 20,000 figure is a long-run average, so treat it as a typical winter rather than a forecast for this one. The ceiling is much higher. USFWS says that in some years, more than 50,000 waterfowl have been counted in a single day. The refuge covers a little over 900 acres of protected land and water, so either number means a lot of birds in a small space. That density is why the agency keeps people off the trail that runs closest to the wetlands.
The same field guide lists the Tundra Swan, Bald Eagle and Red-tailed Hawk among the refuge's birds. The older USFWS brochure marks the Tundra Swan as uncommon in fall and winter, so a sighting is a good day, not a sure thing.
The viewpoints that stay open were built for this
With the Wetland Trail closed, the refuge's viewing points do most of the work. Several of them sit close to the parking lot and don't require a long walk.
| Viewpoint | Where it is | When it's open | What it looks over |
|---|---|---|---|
| Viewing platform | Between the Visitor Center and the administrative building | Dawn to dusk, daily | The permanent ponds, with waterfowl and wading birds |
| Visitor Center scopes | Inside the Visitor Center | Tuesday to Sunday, 10 a.m. to 4 p.m. | The wetland, with volunteers on hand to answer questions |
| Nature's Overlook Store | Run by the Friends of the Refuge | Same hours as the Visitor Center | Large windows, seating and a spotting scope |
| Year-round trail overlook | End of the year-round trail through oak and forest | Dawn to dusk, daily | A wetland overlook platform |
USFWS suggests the platform for anyone with just 15 minutes, which makes the refuge an easy stop on an errand along 99W. The Visitor Center scope and the store's windows are the cold-weather options. They let you look across the wetland from indoors on a wet Sunday, with seating.
The year-round trail is the longer outing. It runs through oak and forest habitat and ends at a wetland overlook platform. USFWS describes it as about two miles out and back, while the Friends of the Refuge list it at about 0.9 mile out and back. If you need an exact figure, call the refuge at (503) 625-5944. The refuge also has a photo blind you can reserve through its administrative office.
The rules that catch winter visitors
The refuge's rules are stricter than a city park's, and a few of them catch Sherwood locals off guard.
No dogs. Pets are not allowed on the trails, with an exception for service animals.
No jogging or biking. Every trail is pedestrian-only, so a morning run along Chicken Creek isn't allowed.
No fee. Entry is free. USFWS notes that the fee booth at the entrance makes it look otherwise, but you can drive right past it.
Go early. USFWS names early morning as the best time to see wildlife. In winter, that fits well with dawn-to-dusk trail hours and short days.
Park in the upper lot. The refuge has upper and lower paved lots. The upper lot is the main one and is closest to the Visitor Center and trailheads. It has four accessible parking spaces. The address is 19255 SW Pacific Highway.
The fall program calendar follows the migration
The Friends of the Refuge calendar for October and November runs alongside the season, ending with a program about the migration itself:
- October 14, 10 a.m. to noon: Puddle Stompers, Bats
- October 17, 4:30 to 7:30 p.m.: Creatures of the Night
- October 24, 9 a.m. to noon: Friends annual meeting, with a presentation and field tour on permanent wetland restoration in the refuge's main unit
- October 24, 11 a.m. to 1:30 p.m.: Art on the Refuge, Markers
- November 11, 10 a.m. to noon: Puddle Stompers, Migration
- November 14, 9 a.m. to noon: Second Saturday Work Party, with registration available
USFWS describes Puddle Stompers as a free monthly program for families, built around a theme, a craft, a story and a short walk. November's migration theme lands right as the waterfowl buildup is underway. The work party listing warns that volunteers will be outdoors on ground that may be muddy and uneven. No December events were posted on the Friends calendar as of this writing. Check the Friends of the Refuge calendar before planning a holiday visit.
The October 24 field tour is the most direct way to see the habitat work behind the winter numbers. USFWS describes the Chicken Creek restoration as a multi-year project covering more than 280 acres, and it calls the project a chance for visitors to watch restoration progress over time. The agency also says Chicken Creek was returned to its natural flow in 2022, and that signs of beaver activity can be found along it. Each acre of restored wetland adds to the space and food available to wintering birds, which is the reason the Wetland Trail closes each October in the first place. The USFWS refuge visitor page lists current hours and trail status, and the Wetland Trail is scheduled to reopen May 1.
At The Lankheet Group, we think knowing Sherwood includes knowing details like this one, such as which weeks the refuge is at its busiest just a few minutes from home. If you're wondering how your Sherwood home fits into this year's market, we're happy to prepare a free home valuation whenever the timing works for you.
