This 60 acre park in Mountlake Terrace - sometimes referred to locally as Candy Cane Park - includes a mile of Lyon Creek as it flows through a mixed deciduous-coniferous forest. The stream does qualify as a small creek during the wet season, and it eventually flows into Lake Washington. But in late spring the creek may be reduced to a trickle, and at the end of a long summer it could be almost dry.
The trail, initially a concrete sidewalk, passes the playground and picnic area, then splits and circles around both sides of a large open grassy area. The branches rejoin up ahead, and as you continue on into the forested area the ongoing trail surface is varied and sometimes more rustic. Here and there along the way you might encounter a short muddy section.
Initially, a few odd-looking, heavy-duty chain baskets appear suspended on six-foot posts near the trail. These are intended for players who have graduated from Frisbee tossing to the more exacting sport of disc golf. Some baskets are located here, and others are in a park area across 48th Ave W. Depending on when you do your hike, you might see a few golfers in action.
There are a number of side trails along the way. Two or three seem official and lead out to side streets, while others - best avoided - are probably just social trails. There are no trail signs here to help you with route finding, so if in doubt just stay on the wide main trail. It's easy to follow and has only one kink where it heads first left, then right. It's a gentle uphill grade all the way.
It's quite pleasant as a forested urban hike, and you will be under the forest canopy most of the way. In spring, a profusion of buttercups often line both sides of the trail, interspersed with youth-on-age, fringe cup and blossoms of wild berries. A bit farther along, in April or May, you may find a lot of false lily of the valley ("snakeberry") in bloom, plus avens, bleeding heart and skunk cabbage. Wildflower fanciers will, no doubt, identify a few others.
You almost certainly will see a few squirrels, and it's not unusual to see a bunny. The loud taps of woodpeckers are common here, and interludes of birdsong are frequent. You may be able to sight and identify some of the small birds -- if you are a bird fancier, bring your binoculars.
The park officially ends in about a mile, when you reach 221 St SW. But the trail and ravine continue on across the street for another 400 feet or so. You can explore this extension if you like. The ravine becomes shallower and neighboring backyards closer, and the trail itself comes to an abrupt end when you step onto the concrete at 49th Pl W. If you haven't turned around already, you will need to do so here and return to the trailhead the way you came.
For a map that actually shows the park trails, your best bet may be to go to maps.google.com and search for the park address of 23200 48th Ave W, Mountlake Terrace, WA.