The phrase "a trail begins" is correct and usable in written English.
It can be used to indicate the start of a path or journey, either literally or metaphorically.
Example: "As the sun rose over the mountains, a trail begins that leads adventurers into the heart of the wilderness."
Alternatives: "a path starts" or "a journey commences".
This is where the digital search ends and a cumbersome paper trail begins.
Each trail begins with a trailhead--a sign that generally states the name of the trail and the distance to the end (or how long the loop is).
THE HIKE -- The Longs Peak Trail begins a mile off Highway 7, nine miles south of Estes Park.
The classic Burns trail begins a few miles away in Alloway, where he was born in a thatched cottage in 1759.
Directions to the trail head: Agua Caliente County Park is on Highway S-2 (the main north-south artery through Anza-Borrego Desert State Park, 22 miles southeast of Highway 78. Day-use parking fee is $2 per vehicle. Parking for Squaw Pond Trail is right next to the park entry station in a picnic area. Moonlight Canyon Trail begins at Campsite 140 next to the shuffleboard courts.
The loop trail begins with a mile and a half section through the forest along the rim of the crater, then descends 400' to the floor, essentially a cooled down and solidified pool of lava, and crosses the floor before ascending back up to the rim on the other side.
Hermit Trail begins with a steep descent, which silenced a fountain of conversation from Stein and Ben.
The trail begins with a wicked climb up 650 steps carved into a hillside and ends a brutal (and lovely) seven miles later (and after a 2,200-foot 2,200-footdesclimb on the other side of Mount Tandlpais, at the tiny town of Stinson Beach on the coast of the Pacific Ocean.
The Skyline Trail begins on a path known as the Museum Trail and continues to a junction with the North Lykken Trail.
Fassbender told GQ he would be producing his first feature with a friend when the campaign trail begins in earnest.
