Bixby later partnered with William B. Post to extend the road inland, around Bixby Canyon and up Cerro Hill to the junction of the north and south forks of the Little Sur River, and thence south to the Post Ranch on the Rancho El Sur. The trip was over a rough and dangerous track. The single-lane road was closed in winter when it became impassable. Coast residents could receive supplies via a hazardous landing by boat from Monterey or San Francisco. The road was gradually improved, including grading of the road up Cerro Hill from the coast to the Little Sur River. By 1920, the trip from Carmel in a light spring wagon pulled by two horses could be completed in about 11 hours. A lumber wagon pulled by four horses could make the trip in 13 hours. A side road into Palo Colorado Canyon was in place by 1900.