One of the river's two unpaved sections can be found at the Sepulveda Basin.

Each of these highways is partially complete, with significant gaps and unpaved sections.

Portions of the unpaved section are often closed for periods of several years due to flood damage.

For example, from Olene, an unpaved section of the trail passes ranch lands, rivers and forests.

The trail's unpaved section near the Great Valley Corporate Center is crushed stone.

In winter, this unpaved section is prone to heavy ice, snowpack, and mud.

There are about 9 unpaved sections, but some paved sections require reconstruction.

North of San Luis Obispo, the coast road was primitive, many sections still unpaved.

The road is made up of two paved sections, connected by one unpaved one.

The highway began as almost entirely unpaved, but more sections are becoming paved each year.