- 2015: See obituary.
- 2013: Lowell turns 92.
- 2008: Publication of Lowell Herrero, a book that reviews 12 years of paintings created at the Calistoga Studio.
- 2007: Solo exhibition and retrospective at theNapa Valley Museum, Yountville, California.
- 2007: Artist of the Year for the Napa Valley Mustard Festival.
- 2006: Painting “Ava and Nonno at Harvest” hangs at the Napa Valley Museum and wins People’s Choice Award for Best of Show.
- 1998 to 2006: Six limited-edition harvest prints released.
- 1997: Wolfgang Puck and Barbara Lazaroff commission three large paintings to hang at the Spago restaurant, in Beverly Hills, California.
- 1996: Solo exhibition at I. Wolk Gallery, St. Helena, California. The show is a sellout. Three subsequent shows continue to sell out and generate a waiting list for Herrero’s work. Association with this gallery ended in May, 2007.
- 1995: Solo exhibition at the Franklin Mint in Philadelphia, Pennsylvania.
- 1994: Best in Class and Best in Show awards at the Franklin Mint annual show; both paintings entered, subsequently purchased by the Mint.
- 1993 to 2003: Joins the Franklin Mint, which reproduces his paintings on limited-edition plates, dimensional bell-jar sculptures, and sculptured eggs.
- 1993 to 2000: Represented by New Masters Gallery in Carmel, California.
- 1988: Begins an ongoing series of popular cow paintings used as the basis for the cow calendar series by Lang Graphics.
- 1986 to 2000: Solo exhibition at Sailor’s Valentine Gallery on Nantucket Island, Massachusetts. This association continues for fourteen years and includes many solo exhibitions.
- 1983 to 1993: First solo exhibition at the Bill Dodge Gallery, Carmel, California. This association continues for ten years and includes many solo exhibitions until the gallery is sold.
- 1981: Begins an ongoing series of cat paintings, which become the basis for a calendar date book; this evolves into the full-size cat calendar series by Lang Graphics.
