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Routes
Hiking trails & Routes
United States
California
Orange County
Irvine

Carlson Trail and the San Joaquin Marsh Loop

Easy

5.0

(6332)

15,950

hikers

Carlson Trail and the San Joaquin Marsh Loop

01:39

6.51km

10m

Hiking

Explore the San Joaquin Marsh Wildlife Sanctuary on an easy hike that covers 4.0 miles (6.5 km) with a gentle 45 feet (14 metres) of elevation gain. This route, known as the Carlson Trail and the San Joaquin Marsh Loop, typically takes about 1 hour and 38 minutes to complete.…

Last updated: April 23, 2026

Waypoints

A

Start point

Parking

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1

1.37 km

San Joaquin Marsh Reserve

Highlight • Natural

San Joaquin Marsh Reserve protects one of the last wetlands that once covered much of Orange County’s floodplain. Located at the head of Newport Bay, it includes marshes, shallow ponds, and channels surrounded by earthen dikes.

Tip by

3.58 km

Pond 4

Lake

B

6.51 km

End point

Parking

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Way Types & Surfaces

Way Types

3.10 km

2.55 km

530 m

328 m

Surfaces

4.91 km

822 m

661 m

< 100 m

< 100 m

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Elevation

Elevation

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Weather

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Tuesday 19 May

27°C

12°C

0 %

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Max wind speed: 4.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

Where can I park for the Carlson Trail and San Joaquin Marsh Loop?

Parking is typically available at the San Joaquin Marsh Reserve, which serves as a common access point for the trails within the sanctuary. Look for designated parking areas near the Sea and Sage Audubon House.

Are there any permits or entrance fees required for the San Joaquin Marsh Wildlife Sanctuary?

No, there are generally no permits or entrance fees required to access the trails within the San Joaquin Marsh Wildlife Sanctuary. It's open to the public for enjoyment.

Is this trail dog-friendly?

Yes, the Carlson Trail and the San Joaquin Marsh Loop are dog-friendly. However, please ensure your dog remains on a leash to protect the local wildlife and for the safety of other visitors.

What is the best time of year to hike the San Joaquin Marsh Loop?

The San Joaquin Marsh Loop is enjoyable year-round, but the best times are typically during the cooler months from fall through spring. This avoids the summer heat and often coincides with peak bird migration, offering excellent birdwatching opportunities.

What is the terrain like on this trail, and how difficult is it?

The terrain is largely flat, especially within the San Joaquin Marsh, with minimal elevation gain. While some sections of the Carlson Trail might have moderate inclines and uneven ground, the overall route is considered easy and suitable for most fitness levels. It's often described as family-friendly.

What kind of wildlife and scenery can I expect to see along the route?

You can expect picturesque views of numerous ponds and lakes within the marsh. It's a prime location for birdwatching, with common sightings of egrets, herons, hawks, pelicans, and ospreys. You might also spot rabbits, raccoons, and occasionally coyotes or bobcats. Despite being near urban areas, the marsh offers a secluded, wild feel.

Is this trail suitable for families with children?

Yes, this trail is highly recommended for families. Its generally flat terrain and easy difficulty make it accessible for children. The abundance of wildlife, especially birds, also provides an engaging experience for younger hikers.

Does this route connect with other trails?

Yes, the route passes through sections of other official trails. You'll encounter parts of the Crescent Trail, Treehil Trail, San Diego Creek Bike Trail, Mountains to Sea Trail, and the California Mission Trail - stage 03 San Juan Capistrano to Mission San Gabriel Arcangel.

Are there any educational resources or facilities near the trail?

Yes, the Sea and Sage Audubon House is located at the parking area within the San Joaquin Marsh Reserve. It offers educational resources, including interpretive hiking trails, a reference library, and a nature shop, making it a great stop for learning more about the local ecosystem.

Are muddy conditions common on the San Joaquin Marsh trails?

Given its wetland environment, sections of the San Joaquin Marsh trails can become muddy, especially after rainfall. It's advisable to wear appropriate footwear, such as waterproof hiking shoes, particularly during the wetter seasons.

Is the San Joaquin Marsh Loop accessible for wheelchairs or strollers?

The trails within the San Joaquin Marsh are largely flat and well-maintained, making many sections suitable for wheelchairs and strollers. However, some parts of the Carlson Trail might have uneven terrain. It's best to check local conditions for specific accessibility details on the day of your visit.

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