The closest trailhead is The Pipeline Trail at Rattlesnake
Gulch. There are great views both of the canyon and of the valley.
Take some pictures, bring enough water and if you haven't found the
other caches in the area you might want to do that also.
Hopefully the only Rattlesnake you run into is the Gulch itself,
but always be aware. It's a little steep getting to the cache
itself but it's not too far off the trail. You will be looking for
a decon container. There is a fee to exit the canyon.
.