SR 124 continues north as Church Street into the city of Ione, intersecting with Buena Vista Road and passing a lake along the way.

Heading northward, SR 124 enters the downtown area of Ione, briefly running concurrently with SR 104 as Main Street before turning northwest as Plymouth Street.

In Ione, the route passes a golf club to the west and a reservoir to the north, while heading towards the northeast.

[6] Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage.

[7] Segments that remain unconstructed or have been relinquished to local control may be omitted.