Anyone who has zipped past an Amish horse drawn wagon chugging along Route 137 has probably imagined a day-long trip from Unity to Belfast.

Now there's an even more meandering and scenic route in the recently completed Hills to Sea Trail.

The 40-plus-mile hiking route is the work of Waldo County Trails Coalition, an umbrella organization for more than a half-dozen conservancies and other groups: Belfast Bay Watershed Coalition, Future RSU 3, Georges River Land Trust, Maine Farmland Trust, Maine Organic Farmers and Gardeners Association, Sebasticook Regional Land Trust, Midcoast Conservancy — itself an umbrella organization for four groups including Sheepscot Wellspring Land Alliance — Unity College and Unity Barn Raisers.

Volunteers built the trail east from Unity and west from Belfast, hitching the ends to a five-mile loop road at Frye Mountain game preserve in Montville.

The western leg of trail opened in sections starting in 2013, and was completed in January. The eastern leg was slower going, in part because there were fewer groups involved. The "sea" leg also had to reckon with a higher density of private properties in the first few miles.

"We'd thought about it for a while," said Skip Pendleton of Belfast Bay Watershed Coalition, the volunteer group that built most of the eastern end of the trail. "But we couldn't figure out how to get out of Belfast."

When the city bought the old railroad corridor and started converting it to a recreational rail trail, it amounted to a green light for the rest.

The trail crosses 60 parcels of privately owned land between Unity and Belfast and the final route could be read as a catalog of the yeses and nos trailbuilders got along the way. Pendleton said building the trail was not nearly as hard as getting permission.

"You might get a couple permissions," Pendleton said, "and then you get a 'no' and you have to backtrack." There were natural obstacles, too, he said, and remarkable land features that warranted bending the trail a little out of the way.

The Hills to Sea Trail opens officially next spring, but with the exception of several sections that are closed for hunting season at the request of landowners, much of it is open today.

Linwood Curtis, whose property on Route 7 on the outskirts of Belfast is crossed by the trail, said he's seen people walking it almost every day, sometimes in large groups.

"At one time, 28 in a bunch," he said. "Another time there was 31. Even had two at night walking it with flashlights."

Curtis seemed happy to have the trail cross his property. He even built a parking lot for visitors along a section of his driveway.

On Oct. 24, volunteers from Belfast Bay Watershed Coalition attached laminated maps and trail information to a kiosk outside Curtis' house, and he came out to greet them, passing out strips of paper with hand-written proverbs.

East of Frye Mountain nearly all of the trails are new, as opposed to, say, a patchwork of existing trails.

Volunteers worked in small teams, making multiple passes along potential routes — first with day-glow ribbon, then blaze-blue paint, loppers, hand saws. By most accounts, it was slow going.

Installing information kiosks represents a finishing touch of sorts — though Maury Hepner, one of the Watershed Coalition volunteers working at Curtis' house, said the nature of trails is that they are never done.

"We're cutting into the woods," he said. "The woods are going to say, 'hmm.'"