(Master Naturalist Advanced Training) This relatively easy, 3-mile loop trail system follows the eastern bank of the scenic St. Croix River near Grantsburg. Along the way are stepped cliffs of pale Cambrian sandstone, deposited near the shore of an ancient sea. Sandrock Cliffs offers a look at many interesting botanical species, due to the shift in soil types throughout the landscape. Meet at the Museum, or the L&M parking lot in Hayward andcarpool to the field site. Register by: July 13 Cost: $35 member/$45 non-member
