Fall is fast approaching, and with it, prime running weather. So to commemorate the end of summer, we called on all-around sneaker expert Gary Warnett to compile his list of The 50 Greatest Running Shoes of All Time. Some you'll recognize, some you won't, as all-time classics like the Nike Air Max 90 take their place alongside lesser-known (but hardly lesser) models such as the Mizuno MZ-84. So we invite you to click through the gallery and take a walk — make that a run — down memory lane.