Getting there: The route is a bit tricky the first time, but there are signs. Also see the "Info" symbols on the map; you may have to scroll northeast to see them. Do not try to use 1330 and 1191--this way is blocked by private property. Instead go EAST of Hwy 170 and hang a sharp U-turn onto a wide gravel road which proceeds to pass back over 170 on a bridge. Follow this very wide road (1120) for several miles. There are multiple signs for Barker Dome. The road--apparently intended as a highway alignment--will end at concrete barricades. Turn right here and go west for a couple miles. This is typical Four Corners gas well service road: fine for street cars when dry, typically impassable when wet. Take another right at an old well tower and go north to the trailhead.
From the trailhead, ride west until you see singletrack cutting across the road. Barker Dome North
is a more mild trail if you want a warm-up.
Otherwise, hang a left on singletrack. Go south and then take a right and start climbing the ridge. At the top of the ridge, you'll join a pipeline road. Go north through a valley with some chunky spots. At the top of the next hill, the pipeline flies off a cliff. Don't follow it, but turn right.
The trail angles down over some very nice slickrock. It returns to singletrack which edges past some exposed sections. Coming down into the valley there is a tinaja just downstream (see photo).
From there, climb a broad expanse of slick rock. The trail now makes another turn at the top and slants down again. It is very narrow in spots with steps and other challenges. Descend to the canyon and follow it downstream. The canyon disgorges north of the trailhead. Either turn left to Barker Dome North
, or south back to the trailhead. If you head back to the TH, you'll cross many sharp dirt gullies along the way - keep your wits about you!