From Blanding, go south on US-191 about 4 miles to it's junction with UT-95. Go west on UT-95 about 30 miles to the signed Natural Bridges road on the right. The monument is about 4.5 miles off UT-95.

From Hanksville, go south on UT-95 about 96 miles to the signed Natural Bridges road on the left. The monument is about 4.5 miles off UT-95.

The long loop hike visits the three bridges, then crosses back to the starting point via the Mesa Trail. If you have two cars or a mountain bike, you can avoid the Mesa Trail, which, in my opinion, detracts a bit from the outing. If taking that option, leave your shuttle at Sipapu Trailhead and hike the loop described in reverse, starting at Owachomo.

My Recommendation (9-miles / 5-6 hours)
From the Sipapu trailhead, follow the trail down. It descends two staircases before a viewpoint side trail goes off on the left a short distance to a fantastic overlook. Probably the best place for taking photos of Sipapu. Continue down the trail to the base of the bridge.

Go down White Canyon, keeping an eye high on the right for a ruin near the top of the cliff bands. It is not visitable from below. Not far below Sipapu, Deer Canyon comes in on the right. At the confluence of White and Deer is a pictograph panel on the west (right) side of Deer Canyon.

Less than 5 minutes below Deer Canyon is the Horse Collar Ruin on the right, just above the stream bed. It is in good shape and very interesting to visit. There is also an arch high on the left here that is easy to spot. Horse Collar Ruin was abandoned over 700 years ago. It has not been restored and shows the original construction methods. Be respectful when visiting to not cause damage.

From Horse Collar, it is 30 minutes or so to Kachina Bridge. There are petroglyphs on the west (left) side of the bridge as you approach it. More interesting, however, are the petroglyphs and ruins on the downstream side. Be sure not to miss them! Go through Kachina, and then follow a use trail up to the shallow alcove on the right. There are also a few pictographs and petroglyphs here.

From Kachina, the trail takes the left-hand canyon (Armstrong Canyon) and leaves White Canyon. A few minutes from Kachina, the trail climbs out of Armstrong up to a bench on the left. If you want a shorter hike, go left at the junction up to the Kachina Trailhead. For the full loop, got right.

Continuing to Owachomo, the trail stays on the bench until passing the obvious dryfall, then re-enters Armstrong. Going up Armstrong, a side canyon comes in on the left. It is a good landmark, one bend above it is a ruin in an alcove on the right side. The ruin is easy to miss if hiking toward Owachomo, but hard to miss if walking from Owachomo to Kachina. It would be moderately difficult to visit, best admired from below.

Easy passage leads to Owachomo. The old entrance trail is visible on the right, across from Owachomo, but to get to the Owachomo trailhead, go through the bridge and follow the trail up.

If you left a car shuttle, you are done. Otherwise take the Mesa Trail back to Sipapu. The Mesa Trail is uninspiring but goes pretty quickly.

Horse Collar Ruin Overlook
Just past the Sipapu Trailhead is the Horse Collar Ruin Overlook trailhead. This short (0.6 miles round trip) hike offers great views of Horse Collar Ruin from above and is recommended.