Tom's Canyon is a pretty great place to ride and this is a great overlook looking out into the Little Dolores Canyon.
The 4.0 Terrain Difficulty is primarily for the road coming in. It's a pretty great road in a lot of places, but there are a number of spots that are rough and washed out. We rode ATVs, and I generally recommend ATVs or UTVs, and I would rate it 2.5 to 3.0 for those vehicles. The road is more difficult for Jeeps or good 4WD pickups, and I'd give it more of a 4.0 rating for those vehicles.
Log Only BYOP - It's not a Micro, but it's tight, and it might be helpful to have tweezers to get the log out. The cache is hidden under a small rock overhang well away from the main edge, hidden by several suspicious rocks. I even placed a stick pointing to the rocks (see pic below)

Additional Waypoints
P0AE96T - Off Loading Area
N 38° 59.760 W 108° 56.026
One of two potential off loading areas for ATV/UTVs
P1AE96T - Off Loading Area
N 38° 59.795 W 108° 56.218
One of two potential off loading areas for ATV/UTVs