We'll be passing through Nashville and staying overnight on our way to NC at the end of July. I was wanting to get in a 20 mile ride early in the morning before we hit the road to NC, so I was wondering if there are any trails downtown-ish (or near I-40) that we could ride to get in some mileage on our way through town. I have been to this site: http://www.greenwaysfornashville.org/directions.htm
and although it shows many trails they are only 1-3 miles long. Is there a linking trail system through the city?

I can't seem to find any info on a decent lengthed bike trail system. I'd prefer to stay off the roads (being in an unfamiliar city and all) and would rather not ride in too urban of a setting where we're constantly crossing streets and stopping/starting.

Don't want to drive too far off I-40 and lengthen the trip any more than we have to.

Just wondering if there's a park or a large recreation area we can get in a decent ride before hitting the road.

Thanks for any insight!