Lamorinda Weekly Newspaper writer, Jenn Freedman, put together a great list of 6 local dog-friendly trails. 

Today’s feature is the Springhill to Buckeye Ranch Loop:
Distance: 2.2 loop
Dog Rules: Allowed off-leash as long as 200+ feet from the entrance
Level: Moderate to difficult with a steep incline and some loose dirt on parts
Access: Springhill Staging Area

More Info: Managed by East Bay Regional Park District; https://www.ebparks.org/parks/briones/