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Hiking trails & Routes

San Mateo County

Seal Slough (Marina Lagoon) – Mariners Point loop from San Mateo

Hiking trails & Routes

San Mateo County

Seal Slough (Marina Lagoon) – Mariners Point loop from San Mateo

Easy

5

hikers

Seal Slough (Marina Lagoon) – Mariners Point loop from San Mateo

01:07

4.46km

10m

Hiking

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: June 14, 2026

Waypoints

A

Start point

Parking

Get Directions

1

632 m

Seal Slough (Marina Lagoon)

Highlight (Segment) • River

Seal Slough, or Marina Lagoon is a narrow tidal channel through salt‑marsh wetlands. It begins at the San Mateo Bay shoreline and winds east into Foster City. It is home to dense cordgrass, pickleweed, and mudflats, as well as invertebrates, fish, and the endangered California clapper rail. Bikers can enjoy the paved Bay Trail segment that follows the slough’s east bank.

Tip by

2

2.21 km

Mariners Point

Highlight • Cycleway

Excellent dedicated bike trail along the bay with sweeping bay and bridge views

Tip by

3

3.21 km

Observation Platform at Bair Island Marsh

Highlight • Viewpoint

A platform built in the marshes for observing flora and fauna

Tip by

B

4.46 km

End point

Parking

Way Types & Surfaces

Way Types

4.28 km

171 m

Surfaces

4.20 km

171 m

< 100 m

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

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Weather

Powered by Foreca

Today

Friday 26 June

21°C

13°C

0 %

Additional weather tips

Max wind speed: 33.0 km/h

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Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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