Tuleyome was founded in 2002 as a volunteer advocacy-oriented nonprofit organization that is focused on protecting both the wild and agricultural heritages of the Inner Coastal Range and the Western Sacramento Valley for current and future generations. These areas include all or parts of Yolo, Lake, Napa, Colusa, Glen, Mendocino and Solano counties in northwestern California. Tuleyome has worked to these ends by:
- Spearheading formal Wild and Scenic River designation for upper Cache Creek
- Working with Congressman Mike Thompson to successfully designate Cedar Roughs and Cache Creek Wilderness Areas and additions to Snow Mountain Wilderness, adding them to the National Wilderness Preservation System.
- Acquiring ecologically key properties at Ireland Ranch, Cold Canyon and Goat Mountain and the Berryessa Peak trail easement to help open lands to public use.
- Building and continuing to maintain public trails at Cold Canyon, Berryessa Peak, and Valley Vista.
- Eradicating invasive Arundo and tamarisk weeds along the wilderness run of Cache Creek with a team of volunteers.