Malcolm Lewis:
13.1 mile out and back. Running over or next to Lake Washington all the way. Start at the parking lot at Top Park on Mercer. First 2 miles across the I-90 bridge, down the steps onto Lakeside, merge onto Lake Washington Blvd, then left into Seward Park. You could probably go all the way round Seward Park and make this a 15-16 mile run. You could also walk or bike some or all of this with you kids. Some nice real estate eye candy to look at along the way.