Walked the trails in the Union Bay Nature Area, Foster and Marsh Islands and Washington Park Arboretum on this rainy Sunday morning. We parked at the UW Center for Urban Horticulture, headed south through the nature area, behind Husky Stadium, crossed the Montlake Bridge, along the Foster and Marsh Island trails, under 520 then south through the arboretum to the Pacific Connections Gardens on the southern tip, then returning the way we came. Total mileage out and back for this route is right about 8 miles with virtually no gross vertical.
The trails through the Union Bay Nature Area are a bit muddy as WSDOT is doing some trail improvements as part of the 520 project but nothing too bad. The Marsh and Foster Island trails/walkways are all completely above water with no issues, (no wading required!) The trail under 520 through the construction zone over to the arboretum is open. The arboretum has quite a bit of off season construction going on with a few trails closed but nothing you can't find a way around. Bunches of birds out all over, dozens of Red Winged Black Birds with their distinctive call, lots of different ducks, cormorants, and what I think was a young bald eagle (still in the grey/brown mottled coloring,) in a tree next to the old MOHAI site. Several early Witch-hazel are already blooming in the arboretum, one with a spectacular fragrance, certainly a sign that spring is on its way!
Lastly, Seattle Parks and Rec has a quick survey for users of the Foster/March Island trail if you are interested - https://www.surveymonkey.com/r/arboretumwaterfronttrail