Bothe-Napa Valley State Park
or just down the street makes for a great walk/jog on this quiet country lane. Also Las Posadas in Angwin has some fabulous hiking trails as well as Mt St. Helena farther north.
Ritchey Canyon Trail and Coyote Peak is a 5 mile heavily trafficked loop trail located near Calistoga, California that features beautiful wild flowers and is rated as moderate. The trail offers a number of activity options and is accessible year-round. Horses are also able to use this trail.