I've biked the Wilderness Park trails just northeast of Tampa, Florida, six times now and highly recommend them. Here's a map of the trails (click to enlarge photos)...
The paved loop trail runs 7 miles, If you also bike the half mile from the Flatwoods parking area to the loop as well as the 2 mile access from the Bruce Downs parking area, you get a nice 12 mile ride on pavement. They even have re-watering stations in several places providing cold water from coolers, very appreciated on warm days.
Today I biked 25 miles, 15 on the paved trail, and 10 miles on the single track mountain bike trails. A few years ago, I've biked the 15 mile mountain bike loop, but generally I bike the paved trail to reach my favorite mountain bike segments.
. The trails are in good shape with very little accumulation of "sugar sand" (a white sand often found in Florida) to impair your ride on the trail, unlike other places I've biked in Florida. Be aware, though, that roots are abundant, and there are many tight turns and some places where the trail passes through narrow openings between trees, all of which make for a stimulating ride! Just keep your concentration level on high mode and take your time.
Biking the mountain bike trails
Biking the paved trail loop