Hazard Canyon Reef

Hazard Canyon Reef is a rocky intertidal shelf at the mouth of Hazard Canyon, on the north side of Montaña de Oro State Park. The canyon cuts inland from the coast as a steep wooded ravine, with a small creek running through it to the beach. The trail to the reef descends roughly one mile from the parking pullout, including a long wooden stairway and an extended boardwalk that carries hikers safely down into the mouth of the canyon. The reef is widely regarded as one of the better tide-pool destinations on the central California coast.

The wide intertidal shelf of exposed rock, with deep tide pools and narrow surge channels extending into the water, makes the reef a rocky reef biome. The narrow strip beyond the shelf, where waves break against the outer edge, is a surf zone biome.

Tide-pooling at minus tides is the dominant activity, and wildlife viewing along the canyon and the bluff above is common, with harbor seals on the offshore rocks and shorebirds in the canyon. Calm low tides are the only safe window for entry. Waves on a swell or rising tide wash across the shelf and have swept visitors out to sea, and the kelp and algae on the rocks are slick and contribute to falls. Between the long carry of gear and the reef's exposure, snorkeling, scuba diving, hook-and-line fishing, and spearfishing are all uncommon.

Parking is a small dirt pullout on the north side of the Montaña de Oro entrance road. The descent through the stairway and boardwalk takes roughly 30 minutes one way. Hook-and-line fishing and spearfishing are legal under standard California regulations.