Wolf Creek Alliance and Bear Yuba Land Trust trail builder Bruce Herring moves a boulder into place along the Daspah Seyo Trail adjacent to the paved Wolf Creek trail Thursday morning in Grass Valley. Trail builders work a few hours a week, but get a lot done. Photo by Elias Funez New rustic thoroughfares have been added along Wolf Creek through the combined efforts of the city of Grass Valley, Bear Yuba Land Trust, Wolf Creek Community Alliance and the Nevada City Rancheria. Locals and visitors alike can participate this month in the land trust’s inaugural NatureFest, a free event dedicated to engaging families in the outdoors.