Most of this trail is sun-exposed, and is usually free of snow by early June, remaining rideable until November. Also called the North Fork Trail is a double-track located across the road from the Byway trailhead. Looking southwest down the trail, about a half mile from the Provo River Overlook. Because the trail is fairly new, the gravel hasn't packed completely yet. Young children may struggle a bit going uphill.
Training wheels are absolutely out of the question.
Pick them up at the North Fork Trailhead with a shuttle. View down to the Provo River. The trail is very straight, broad, and not the least bit tricky. You'll enjoy the longleaf pines, open meadows, and views over the Provo River. View of a shadier portion of the Byway.