Fenton, MI: how dark is the sky here?
Satellite radiance puts Fenton in the suburban edge band. A noticeable glow near the horizon. Brighter stars and constellations are easy to pick out; the Milky Way is washed out. That's brighter than 24.9% of the 3,206 US cities in this dataset.
This comes from a satellite measuring light radiating upward, not a person's eyes on the ground, so it isn't the same as a Bortle class, though the two track each other closely.
Where to go for a darker sky near Fenton
The closest place in this dataset with a meaningfully darker sky is Oregon, OH, roughly 80 miles away in a straight line, rated rural. Road distance will be more.
Oregon, OH is itself still a measured city, not a designated dark-sky park, this only compares against the 3,206 places this dataset covers.
How Fenton compares nationally
Fenton, MI has a population of about 11,882, one of 3,206 US cities of 10,000 or more residents in this dataset. Fenton places 794 of 3,206 cities in this dataset's darkest-to-brightest order.