I've been exploring the parks in Seattle - I can make a 5 mile, 400' elevation run by doing two loops around Lincoln Park, or another five by running a figure-eight loop through the Arboretum. But the best place I've found so far for urban trail running is Discovery Park. A counter-clockwise loop on the using the North Beach, South Beach, and Loop Trails creates a fun, scenic, a easy-to-access five mile loop features a killer climb half-way.
Statistics: Discovery Park Circumnav, counter-clockwise. 5 miles, 430' gain/loss. No time recorded. 23 July.