Molly Lonborg was born and raised in the coastal village of Mendocino, California. She graduated California Polytechnic State University, San Luis Obispo earning a degree in Earth Science with a concentration in Wine and Viticulture. During her undergraduate years, she also spent a year studying geology  at the University of Otago in Dunedin, New Zealand.

Her first harvest was in the Edna Valley (near San Luis Obispo) with Baileyana, followed by more hands-on cellar experience at Justin Winery in Paso Robles. Not long after, she landed at Halter Ranch in Paso Robles beginning her time there as Lab Manager and Cellar Assistant, before quickly moving up the ranks to Enologist, Assistant Winemaker, and then to Associate Winemaker. She received a career defining accolade during her residency at Halter Ranch and was named Winemaker of the Month by Wine Business Monthly. 

Molly is currently the winemaker at Alta Colina Winery in Paso Robles, succeeding founder Bob Tillman. The winery is noted for its Rhône varietals, including Syrah, Grenache, Mourvedre, Petite Sirah, Marsanne, Roussanne, Viognier, and Grenache Blanc.

Molly lives in Paso Robles with her husband, Jordan Lonborg, Viticulturist at Tablas Creek Vineyard, and her two children, Alma and Ziggy. She enjoys spending time with loved ones, hiking, traveling, and live music.