Bait up, cast out and wait. The weather in the east end of the Gorge in February sometimes can be unexpectedly decent, while the metro area is socked in by clouds and drizzle. Be sure to have the appropriate state fishing license and know the catch regulations. No. 440 on the Oregon side of the Columbia River Gorge. You'll not be alone, but the crowds get much worse later in the year.
Eagle Creek is a gorgeous stream, and the trail provides many nice views.
It's most of a day's outing to walk the 6 miles to Tunnel Falls, where the trail passes behind a big waterfall. Be prepared for rain. An alternative is Siouxon trail No. 130 east of Chelatchie in the Gifford Pinchot National Forest. If it's been a snowy winter, the roads leading to this trailhead might not have melted out yet. Siouxon Creek rivals Eagle Creek in beauty, and you'll meet far fewer hikers.