At Hwy 78, mile 74.1, exit into the Grapevine canyon.
Start out on the left of the wide sandy wash.
At any fork, keep to the left.
Some seeps in the wash with water most of the year.
Expect a couple of small dry falls and scrubs.
There is a spring high up the south side of the canyon wall, closer to the start, watch out for tubing.
There is no real end, the canyon forks and narrows and gets steeper and steeper/
The vegetation in the canyon is growing back strong and is getting more problematic. (end of 2014 still easy to pass).
How to get here:
At Hwy 78, mile 74.1, exit into the Grapevine canyon, drive for 1.9 mile, disregard a branch to the left to a small parking (Grapevine Summit Parking).
The road is a sand road, but good, you need some ground clearance.
Park just before the crossing, Grapevine / Yaqui Well.