I live here, run here, coach here and I love it. I live in a western burb in South Oakland County near 8 mile Rd (yes that 8 mile) and the running community is active. Between the Hanson's group and the RunningFit groups, there are organized weekly runs, both on the roads and on the trails. The Detroit metro area boasts an extensive metro and state parks system that runners utilize extensively.
The outdoor running season is great for 9 months. Both the spring/summer have been exceptionally cool and pleasant for training. However, one must be prepared for our winters as the past two have been particularly brutal.
Regarding Detroit and the perception of it being tough, yeah we're a tough city with great people that love strong, play hard, work when there are jobs, and make the best damn music in the world. I love my Detroit people and go whereva I want wheneva I want and have no fear...but I do have repect.