Using Google (which doesn't seem to know the walking shortcuts - so you can chop a bit off these totals)...
I am 700m from the nearest park, but it's a silly little thing:
I'm 900m from the nearest large park, but it's just a field:
And I'm 1.1km from the nearest large, landscaped park, Bannerman Park. It's where I'd go to ropewalk (if I did that), hammock, skate in winter, swim, etc.