Yucaipa Valley is a mountain-locked mesa, varying in altitude from 2,000 to 3,000 feet. It is recognized as a fine site for apple and cherry orchards. It is to California what Hood River Valley is to Oregon ... and what Yakima Valley is to Washington. 2
Elevating your legs may help relieve some discomfort. In your case, however, waking up to a discomforting feeling of tired and heavy legs may not be caused by the lack of rest alone and it could be due to insufficient sleep or poor sleep quality.
1 Aching or burning sensation in the muscles (not the joints) of your legs or arms, such as when walking up a hill or doing repetitive arm exercises, such as hanging up laundry. The sensation stops after you've taken a short break.  Legs feel tired or heavy.