Rachel Teannalach is a contemporary landscape painter based in Boise, Idaho. She grew up in northern New Mexico, where she gained her appreciation for landscape painting through artists such as Georgia O'Keefe and Maynard Dixon. Teannalach earned her BA in Fine Arts from Scripps College for Women (Claremont) before moving to Marin County for six years. She arrived in Idaho in 2008, where she felt at home by the mountains in the high desert. During her ten years in Boise, Teannalach has developed an intimate relationship with a wide range of Idaho landscapes. She has travelled throughout the state to paint and research for collaborations with conservation organizations, supporting their efforts to preserve the lands she loves to paint. In 2014, Teannalach helped Idaho Conservation League establish its Artist in Resident program. She also works with Conservation Voters for Idaho. Confluence is her second collaboration with Advocates for the West.

Teannalach is well known for her daily "tinyExpanse" paintings, but also creates large-scale landscapes. Her work is characterized by bold brush strokes and reduction of detail to distill the essence of a landscape. Teannalach paints both Plein Air and in the studio, always using the “alla prima” (wet on wet) method to maintain freshness of brushwork.

Teannalach's work is guided by the belief that the observation of nature revives our recognition of beauty and restores our sense of belonging in the natural world. Painting provides a way to step out of the frenzy that life so easily becomes, to leave, in W.B. Yeats’ words, “a little space for the rose-breath to fill.”