From a Curbed.com online article:
Located in the corner of northwest corner of Magnolia, Discovery Park is an urban gem. The former Army Post has forest, meadow, a beach, a lighthouse, and old officer housing. And you can get there via the 19, 24, and 33 Metro buses.
The classic choice is the 2.8-mile Loop Trail which takes you through the woods and meadows to the park’s literal and figurative highpoint: a bluff overlooking Puget Sound that offers a great view of the downtown skyline. If you’re looking for more you can drop down to the beach and lighthouse before hiking back up to the Loop Trail.
To read more click on following link: https://seattle.curbed.com/maps/best-seattle-day-hikes-trails