Park at Seatack Park (on Birdneck Road just north of Carissa Court). You may also be able to park at the school or tennis center near the intersection of Birdneck Road and General Booth Boulevard (check local parking restrictions).
I walked this with my kids. It's a nice trail, most of it is right up against the woods and you can hear the crickets. There were other walkers, joggers, and bikers. But I found the traffic noise kind of a nuisance.
TrailLink is a free service provided by Rails-to-Trails conservancy
(a non-profit) and we need your support!