In brief:
Birdwatching and views are exceptional on this Mare Island shoreline hike.

Distance, category, and difficulty:
This 3.75 mile out and back hike is almost completely flat, and is an easy hike.

Exposure:
Totally exposed.

Trail traffic:
Moderate.

Trail surfaces:
Wide dirt trails.

Hiking time:
90 minutes, or more if you're birdwatching.

Season:
Nice any time.

Getting there:

From CA37 in Solano County, exit 17/Mare Island. Drive south on Walnut Avenue 0.7 mile, then turn right onto G Street. Drive 0.1 mile to a t-intersection, then turn left onto Azuar Drive. After 0.3 mile, turn right onto Dump Road. Continue on Dump road to the parking lot at the end of the road.

GPS Coordinates* for Trailhead:
Latitude 38°6'2.00"N
Longitude 122° 17'6.63"W
(* based on Google Earth data, shown as degrees, minutes, seconds)

Gas, food, and lodging:
Gas, restaurants, and services available east in Vallejo. No camping.

Trailhead details:
Small gravel parking lot. Portable toilet but no drinking water. No parking or entrance fees. No paper maps. There are designated handicapped parking spots and trails are wheelchair-accessible (may be muddy).

Rules:
Hikers only. No dogs. Entrance gate is locked at sunset.

The Official Story:
Discover Mare Island (not sure if this is official -- can't find anything else).

Map Choices/More Info: