Walk to the end of Madrone Avenue this month, past the last houses where the road narrows into Valley Way, and you will hear the same sound most Larkspur dog walkers hear right now: almost nothing. The creek bed is there. The rocks are there, worn smooth from winters of higher water. What's missing is the water itself, because Dawn Falls is not a spring-fed cascade that runs year-round. It is Larkspur Creek doing what a seasonal, rain-dependent stream does in early September, which is mostly not run.
That fact alone isn't the story. Every trail app and hiking blog mentions that the falls can be dry in summer and fall. The part worth knowing if you actually live here, and actually plan to walk this trail more than once this year, is that the dry season is when the rest of Baltimore Canyon Preserve is at its best, and that most visitors never find out because they treat the falls as the destination instead of a landmark along the way.
A Rain-Fed Waterfall in a Dry Month
Dawn Falls sits inside the 193-acre Baltimore Canyon Preserve, part of the Blithedale Summit Open Space Preserve that climbs from downtown Larkspur toward the northern flank of Mount Tamalpais. The cascade itself can run as high as 30 feet after a strong storm, but it depends entirely on recent rain to do it. Visit in October or early fall, and you can find the creek reduced to dust and bare rock, with the only reliable water coming from a fountain installed near the trailhead for hikers and their dogs.
That's not a flaw in the trail. It's a fact about the watershed, and it means the smart move in September is to stop treating the falls as a checkpoint you either hit or miss and start treating the walk itself as the reason to come.
Two Ways In, and They Are Not the Same Hike
Most people find Baltimore Canyon the same way: they drive to the end of Madrone Avenue, where it becomes Valley Way, and park in one of the four or five legal roadside spots near the upper trailhead. On a weekend morning those spots fill early, and the overflow spills back down Madrone, which means a walk that should start in five minutes can start with a ten-minute search for somewhere legal to leave the car.
There's a second way in that most out-of-town hikers never use, because it requires knowing the neighborhood well enough to find it. From Sir Francis Drake Boulevard, College Avenue leads to a turn onto Woodland Road, then Evergreen Drive, which climbs toward Crown Road. Follow Crown Road to its dead end and you're at the preserve's west access point, a quiet residential street with its own street parking and a trail that ties into King Mountain Open Space Preserve rising above town. It's a longer drive from most of Larkspur, but on a Saturday when the Madrone Avenue turnout is full, it's the difference between hiking and circling the block.
Before you head out, a few rules worth knowing so the trip doesn't get complicated once you're there:
- Dogs are welcome on signed trails but must stay leashed, with a 6-foot maximum leash length
- Up to three dogs per person is the limit without a commercial permit
- There are no restrooms anywhere in the preserve, so plan accordingly before you start
- Some trails carry seasonal night closures to protect sensitive wildlife, so check posted signs if you're timing a late hike
What the Canyon Still Offers When the Water's Gone
The redwoods don't care that the creek is low. Baltimore Canyon's main draw, even in a dry month, is the shade. Coast redwoods mix with Douglas fir, maple, and madrone along the canyon floor, and the combination keeps the trail noticeably cooler than the exposed ridgelines elsewhere in central Marin. That's worth something on a warm September afternoon regardless of what the creek is doing.
It's also a good month for birding. Pileated woodpeckers are common in the main canyon, and without running water competing for your attention, they're easier to hear and spot. Larkspur Creek, even reduced to a trickle or dry entirely, remains habitat for steelhead and California giant salamander, which is part of why the preserve closes certain trails seasonally at night. None of that requires a flowing waterfall to matter. It requires slowing down enough to notice it.
There's a piece of local history in the canyon too, easy to miss if you're focused on reaching the falls. Partway through the preserve are the remnants of an old quarry, where blue basalt was once extracted for local construction projects, including a nearby dam. It's not marked with interpretive signage the way a park might advertise it, which is exactly why most first-time visitors walk past without knowing what they're looking at.
The Payoff Is Usually Past the Falls, Not At Them
Here's the part that changes how most people should walk this trail in a dry month: Dawn Falls itself is roughly the halfway point of a loop, not the end of an out-and-back. The full route runs about six miles round trip with somewhere around 600 feet of elevation gain, generally taking two and a half to three hours at a moderate pace. A large share of visitors reach the dry falls, take a look at the bare rock, and turn back, which means they miss the section of trail that a dry September actually rewards.
Past the falls, the route connects to the Hoo-Koo-E-Koo Trail, a fire road that runs along the eastern side of Mount Tam and opens up to views of the San Francisco Bay and the Marin peninsula that the shaded canyon floor doesn't offer. In spring, the slopes along this stretch fill with wildflowers. In September, with clearer, drier air, the bay views tend to be sharper than they are in the damp months when the falls are actually running. It's a genuine trade: less water below, better visibility above.
If you started from the Madrone Avenue side and have the legs for it, continuing up toward King Mountain Open Space Preserve extends the loop further and adds more of the ridge views without retracing your steps. If you came in from Crown Road, the same connective trails work in reverse, which is part of what makes knowing both access points useful rather than just a parking workaround.
When to Come Back for the Actual Waterfall
None of this means the falls aren't worth seeing when they're running. After a real winter storm, Baltimore Canyon changes completely. Larkspur Creek fills, the trail can flood in low spots, and Dawn Falls becomes the 30-foot cascade the name promises, with moss and ferns lit up bright green under the redwood canopy. That's a different hike, best planned for a day or two after a strong winter storm. If you want that version of the trail, mark it for the rainy season and go into September expecting the quieter, drier version instead.
Either way, Baltimore Canyon rewards the people who treat it as a trail they return to across the year rather than a single box to check. The falls have their season. The canyon doesn't.
If you're the kind of Larkspur resident who already knows which streets to avoid on a Saturday morning and which trailhead has parking when the other doesn't, you already understand what makes this town work day to day. That local knowledge is the same thing Kris Klein brings to conversations about the Larkspur market, whether you're thinking about your own home's value or just curious what's changed nearby. Reach out anytime the question comes up.
