The state Department of Land and Natural Resources cited an 18-year-old visitor Thursday for hiking into Sacred Falls State Park, which has been closed to the public, and issued warnings to two teenage boys hiking with her.

The citation for unauthorized entry is a petty misdemeanor, subject to a minimum penalty of $100  (first offense) .

DLNR officers also issued written warnings that they would be cited if they return to the two boys, both 17, one a resident and the other a visitor. The resident teen’s father was also advised of the warning.

DLNR said the warnings were issued because the boys are minors.

Firefighters helped the three out of the valley after the 17-year-old visitor was injured after falling some 20 feet off the trail.

Sacred Falls State Park has been closed to the public since Mother’s Day 1999 when eight people were killed during a rockfall.