It was a crisp, fall Sunday afternoon, with the sun dazzlingly bright after a summer of relentless rain. I wanted to go off on an adventure to a place I’d never seen.So I did what I normally do on such occasions: I turned to the Maryland Department of Natural Resources. The wildlife agency has an app that you can download onto your smartphone that features an interactive online map showing the exact location of every public access boat launch site in Maryland – almost 500 of them, along with maps of hiking trails, state parks, public fishing piers, and other places you can enjoy the outdoors.I highly recommend the AccessDNR app. I’ve made it a personal mission to use the app to try kayak at all the public boat launch sites in the state. On this Sunday, I looked at the map – and noticed a red dot that I had not yet visited. It was at the Prettyboy Reservoir in Gunpowder Falls State Park, about 40 minutes north of my home in Baltimore.So I drove up there, and after dragging my kayak down to the water’s edge, set off paddling across the glassy waters in the late afternoon sun.