A third candidate has announced she will join the race to represent District 4 on the Santa Fe County Commission.

Mika Old, 32, will face off against 62-year-old Stephen Chiulli, a local automobile shop owner, and 39-year-old Adam Fulton Johnson, director of a Santa Fe historic preservation nonprofit, in the June 4 Democratic primary.

Incumbent Commissioner Anna Hamilton reaches her two-term limit at the end of the year. Hamilton has twice run unopposed to represent the district, which stretches east and south from the city of Santa Fe and includes the communities of Cañada de los Alamos, Cañoncito and Glorieta.