During times of trail closure, off-trail travel is prohibited in the following area:
- From west side of Lassen Peak Parking Lot to the summit of Eagle Peak.
- From the summit of Eagle Peak to the summit of Lassen Peak.
- From the summit of Lassen Peak to the intersection of the Terrace Lake and Hat Lake Trails.
- From the summit of Terrace Lake and Hat Lake Trails following the Terrace Lake trail to the Lassen Park Highway.
- Following the Lassen Park Highway to Lassen Peak Parking Lot.
See map below: