In a remote northern Minnesota forest, Mica Harju uses what looks like an oversized hoe to place dirt and rocks along a new stretch of mountain bike trail carved through the woods. “This is the real ...

Adam Harju uses a 3-ton excavator to move huge rocks into place on a new mountain bike trail he’s building near Split Rock Lighthouse State Park in northeastern Minnesota on Aug. 9.

Over the last decade, and especially over the last five years, mountain bike trail systems have been popping up across Northeastern Minnesota. The pace of construction hasn't slowed at all this year. ...