International Mountain Bicycling Association has set up a list of rules
that mountain bikers should follow.  Please respect these rules as they
are what many mountain bikers live by.  

 IMBA Rules of the Trail
 
   1. Ride on open trails only.  Respect trail and road closures (ask
      if not sure), avoid possible trespass on private land, obtain
      permits and authorizations as may be required.  Federal and
      State wilderness areas are closed to cycling.
   2. Leave no trace. Be sensitive to the dirt beneath you.  Even on
      open trails, you should not ride under conditions where you
      will leave evidence of your passing, such as on certain soils
      shortly after a rain.  Observe the different types of soils and
      trail construction; practice low-impact cycling.  This also
      means staying on the trail and not creating any new ones.  Be
      sure to pack out at least as much as you pack in.
   3. Control your bicycle!  Inattention for even a second can cause
      problems.  Obey all speed laws.
   4. Always yield the trail.  Make known your approach well in
      advance.  A friendly greeting (or a bell) is considerate and
      works well; don't startle others.  Show your respect when
      passing others by slowing to a walk or even stopping.
      Anticipate that other trail users may be around corners or in
      blind spots.
   5. Never spook animals.  All animals are startled by an unannounced      
      approach, a sudden movement, or a loud noise.  This can be
      dangerous for you, for others, and for the animals.  Give
      animals extra room and time to adjust to you.  In passing, use
      special care and follow the directions of the horseback riders
      (ask if uncertain).  Running cattle and disturbing wild animals
      is a serious offense.  Leave gates as you found them, or as
      marked.
   6. Plan ahead.  Know your equipment, your ability, and the area in
      which you are riding - and prepare accordingly.  Be
      self-sufficient at all times.  Wear a helmet, keep your machine
      in good condition, and carry necessary supplies for changes in
      weather or other conditions.  A well-executed trip is a
      satisfaction to you and not a burden or offense to others.