Based on 2,974 research-grade iNaturalist observations in Maryland, Groundhog is most often recorded in May; in Maryland it behaves like a summer visitor / breeder. It ranks #6 among mammals recorded in the state in our data.
Marmota monax
Groundhog in Maryland by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in Maryland in May
White-tailed Deer
Eastern Cottontail
Eastern Gray Squirrel
Red Fox
Common Raccoon
Eastern Chipmunk
American Beaver
Virginia Opossum
Places to look in Maryland
State ParkWashington Monument State Park
State ParkPatapsco Valley State Park
State ParkSeneca Creek State Park
State ParkCalvert Cliffs State Park
State ParkSusquehanna State Park
State ParkGambrill State Park
FAQ
When does Groundhog appear in Maryland?
Mainly March–October, with the most records in May.
How common is Groundhog in Maryland?
It ranks #6 by number of iNaturalist observations among mammals in Maryland (2,974 records in our sample).