A few more tips:
- When you fly over the mountains at 2000 feet or better, cross ridges at a 45 degree angle if possible. this allows a shorter way out if there are adverse winds on the other side of the ridge.
- by all means take the lower ground to pass over, but stay above 2000 feet above the surrounding terrain since winds will still be present and lower ground will have more, focused, stronger winds.
- stay well away from lenticular clouds since they indicate strong winds above the terrain.
- Be aware that in windy conditions, not only lenticular winds are a threat, but that the wind sets up waves that can affect you in clear air, miles downwind as the wind undulate on their way.
- as you cross the mountains be sensitive to what is happening on the other side of the ridge. Is the granite on the other side of the ridge growing (you are staying above the terrain) or is the other side getting smaller (you're sinking in respect to altitude.)
- When flying up slope terrain, don't fly beyond the "point of no return". I.e. the point beyond which, if the engine power is off, the plane can still turn around,
- corollary of the last point, always enter canyons on one side, not the middle. This gives you more room to turn, and never fly so far up a canyon that you don't have enough room to turn back and escape down slope.
If you can find a copy of Sparky Imeson's excellent book "Mountain Flying Bible and Flight Operations Handbook" you will have the best source of info out there.