Big Brush Creek Cave is also unusual, for Utah, in that it has an
exceptionally large entrance. If you look closely, you can see the person sitting in
the middle of the photograph to give you perspective. Another thing of interest, is
that the entrance will occasionally flood completely to the top during exceptionally high
spring runoffs. You can imagine the scene that this creates.
This spring runoff also washes in many logs. It is not unusual
to half to saw your way through a log jam into the cave. Further, you end up with
many interesting mushroom growing on the logs, deep inside the cave.
There is one small nuisance (20 foot) pit that you must negotiate in
this cave. The majority of this cave, however, is horizontal walking passage.
The main part of the passage ends in a rather large room. Extending off of this room
is the dead air passage. It is named this since rotting logs have made the air
quality rather poor. This single passage also makes up a significant portion of the
cave. It has not been completely explored due to the high levels of CO2.