Address: 37.678619, -122.160633 (Roundabout at end of Lewelling Blvd, connecting Bayfront and Anchorage Drive)
Parking: Limited free 4 hour street parking at the roundabout/ 5 parking spaces (1 additional handicapped). From here, walk up Bayfront Dr about 0.1 mile to park entrance. Closer parking is for residents (by permit only), and posted signs note that cars without permit will be towed. There is also ample free parking further down, off of Wick's Blvd near Quebec Ave (about 0.3 mi from park entrance). 
Hours: 1/2 hour before sunrise to 10PM
Type: Easy, flat paved and dirt options
Regulations: Dogs allowed on-leash
Best time to visit: Anytime except a very hot day, as this trail has minimal shade

Description: Heron Bay Trail, in San Leandro, is a beautiful shoreline trail reminiscent of Oyster Bay. It starts off paved, and after passing some houses two dirt trails split off to the left that hug the marsh. If you continue on the paved trail, it snakes around along the coast. This turns into the SF Bay Trail, which you can take North to Marina Park or South to the Hayward Regional Shoreline. It's usually a little cooler, with a nice breeze because it's along the coast. The trail is almost entirely exposed to sunlight, but it often stays cooler because of the bay breeze. On a very hot day, the paved section will get hot under your dog's paws, so check the pavement to make sure it's not too hot. 

We often walk the second dirt trail along the marsh (out and back) and then continue down the paved trail to the beach area. Out and back the walk is about 2 miles. As noted above you can extend your walk for miles by heading to Marina Park or the Hayward Regional Shoreline.