Communication of information between neurons is accomplished by movement of chemicals across a small gap called the synapse. Chemicals, called neurotransmitters, are released from one neuron at the presynaptic nerve terminal.
Follow Trail 12 until it runs back into trail 1 and familiar sights and then you are only about 200 yards from the great Cumberland Falls. To the best of my guessing ability I would say this loop was about 8.5 miles long which took us about 3 hours and 45 minutes.
The loop can be completed in either direction, starting at Wahkeena or Multnomah Falls trailheads. Starting at Multnomah Falls will get you past the crowds first. After a steep climb of nearly a mile and 11 switchbacks on a paved trail, the trail splits, with the paved way continuing out to Multnomah Falls viewpoint. Take a look from the top of the falls, and then continue on the loop by following the Larch Mountain Trail.