Much of Route 128 along the Colorado is in a canyon. There are also some rock formations along the road, such as these, about two miles south of the bridge.
The bridge itself is a replacement for an earlier suspension bridge, called the Dewey Bridge. Its remains can be reached via a short side road near the modern bridge. This is the tower on the east side of the Colorado.
This marker indicates that the Dewey Bridge has been placed on the National Register of Historic Places.
Standing under the east tower, I could see the west tower and the remaining cables.
After crossing the modern bridge and continuing northward for about two miles, I came across this rock marked with Indian petroglyphs and some modern graffiti. There was no road sign about "Indian Writing" or anything else. The stone simply caught my eye.
For more about the Dewey Bridge, go here and here.