Monarch Grove Sanctuary

Monarch Grove Sanctuary
IUCN category IV (habitat/species management area)
A monarch butterfly at the sanctuary
Location250 Ridge Rd, Pacific Grove, CA 93950
Coordinates36°37′35″N 121°55′51″W / 36.6264°N 121.9307°W / 36.6264; -121.9307
Area2.696 acres (1.091 ha)
Established1992
Governing bodyCity of Pacific Grove

The Monarch Grove Sanctuary is an urban nature preserve in Pacific Grove, California. It protects the monarch butterflies that overwinter each year in Pacific Grove after migrating there and arriving in October. A volunteer crew maintains the sanctuary. About 12–16,000 butterflies stayed at the sanctuary during the 2022-23 winter, making it the fourth largest of its type in California.