
If you live in the South Bay, you probably already know about the dirt and gravel paths that encompass the southern end of San Francisco Bay. Starting with Palo Alto there is the Palo Alto Baylands; Mountain View has the Moffett Field levee, Sunnyvale has its Baylands Trail, and Alviso has a loop around the Slough. It’s possible to put together a nice, flat loop that takes in all of these since they’re near each other and connected by paved sections of the Bay Trail.
Yet there is another unpaved trail that completely escaped my attention: the Shoreline Trail. I stumbled across this trail by accident while looking at Google Maps of the Dumbarton Bridge. Although I’ve ridden across the Dumbarton by bike many times there is no obvious signage that this trail exists when you’re cycling along Marshlands Road, the frontage road that you must take to get onto the Dumbarton from the eastern side. In order to find it you have to know about it because it’s tucked away underneath the bridge after the turn onto the Dumbarton. (Crossing from the western side you never even see that Marshlands Road continues behind you to a trail.) Continuing a short distance beyond the turn you reach a small parking lot, which is especially convenient for walkers, and after turning under the bridge onto the dirt there is a storm fence with a gate that is open during visiting hours (7 AM to 9 PM). From there you can take the trail four miles along the former levee to the mouth of Alameda Creek.
The views along the trail are entrancing. Once you leave the roar of the Dumbarton Bridge behind you, you find yourself on a peaceful, placid dirt trail surrounded by water with only the wind and the calls of sea birds. If the weather is clear, you will see the San Mateo Bridge in the distance and across the Bay on both sides. Of course the eastern shore is closer and those brown (or green during the wet season) hills belong to Coyote Hills Regional Park. It’s possible to start the trail at the northern end by taking the Alameda Creek Trail, a very well-maintained and wide multi-use path along the entire creek from anywhere as far east as Niles all the way to the Bay. If you’re planning to ride the trail as a loop and not as an out-and-back, I recommend you ride it north (clockwise) because the sun won’t be in your eyes and you’ll have the Bay in front of you rather than staring at the Dumbarton. There is one disadvantage to heading north: the prevailing wind. Usually it’s from the north or northwest and depending on its severity you could be fighting it all the way. You’re exposed and there’s nothing to provide any protection. On the day we rode it we had a wind but it was “normal” it didn’t faze us; if anything it was invigorating.
The beginning of the trail is a doubletrack that eventuallly turns into a slightly uneven, narrow dirt road. The surface is mostly packed dirt but there are a few sandier sections that aren’t troublesome. We did it on our “gravel” bikes and it was fine. We saw mountain bikes as well as road bikes with bigger tires and they seemed to be handling the trail fine. I think even a road bike with narrow tires would be able to do this trail by going slightly more slowly. Overall there were just a handful of cyclists on the trail the day we rode it; there were about the same number of walkers but they clustered where the Alameda Creek Trail ends at the northern end of the Shoreline Trail. Perhaps due to its remoteness and having to compete with sexier places like Mt. Diablo or even the Coyote Hills Regional Park nearby, it seems to be very lightly used. And that’s a good thing because it is a great place to stop and take in the wonderful views from the levee amidst the peace and quiet.
What do you see out there? Well, there are a zillion sea birds along the other abandoned salt pond levees. With only one exception all the other levees have all been breached so you can’t ride on them. I presume this was done to help them revert to a more natural state as well as improve the movement of Bay water. The trail is part of the Don Edwards San Francisco Bay National Wildlife Refuge. Birds are nesting on the old levees probably because predators have a difficult time getting to them. There is also narrow marshland along the west side of the trail. By the way there was no garbage or litter on the trail. Is that due to lack of use or that it all gets blown or washed away? About midway the one other intact levee connects and you can take it east to Coyote Hills Regional Park if you wish. Otherwise turn left and head north again to get to the end and the Alameda Creek Trail.

The Alameda Creek Trail is by comparison urban and civilized: it’s fully paved, wide, and a dream. As I mentioned already it continues all the way to the entrance of Niles Canyon in Fremont, a distance of about 12 miles. We didn’t take it all the way but we saw enough to guess that like other MUPs in the East Bay Regional Park System it’s very well maintained. If you’re interested in getting to the trails by BART, Alameda Creek runs not too far from the Union City BART station.
After getting a good glimpse of the Alameda Creek Trail, we turned around and headed back in order to explore the views from the Coyote Hills Regional Park. Although the park has about a dozen trails, the two with views of the Bay are the Bayview Trail and the Red Hill Trail. The former is paved until you turn onto the Apay Way Trail; the latter is dirt and instead of being closer to Bay level follows the ridge of the hills. We took the Bayview. After a short incline you reach a more-or-less level section that parallels the Bay. The views are scenic; there were a few walkers on the Saturday we were there and the trail was not crowded at all. Midway, where the other remaining levee trail actually intersects the Bayview, we turned onto the Apay Way Trail, which rolls and eventually brings you to Highway 84. An overpass for pedestrians and bicycles was constructed over the busy highway and we took it back to the National Wildlife Refuge parking lot where we started our ride.
All told our ride was about 18 miles and we could easily have extended it by exploring the park or by continuing further up the Alameda Creek Trail. This is an easy dirt ride with great views. Highly recommended!














