River CA

FOREST GLEN

By Hidden Swimming Holes Team — Updated February 28, 2026

Plan a visit to the Forest Glen swimming hole on the South Fork Trinity River. Find directions, safety tips, and details for swimming and snorkeling.

Free
Access
Unofficial
Status
Very confident
Confidence
South Fork of the Trinity River
Water Body

Location Details

Nearby Towns
EUREKA, FORTUNA, REDDING, FOREST GLEN
Coordinates
40.37702315, -123.3269428

About the Forest Glen Swimming Hole

Tucked into the heart of Shasta-Trinity National Forest, the swimming hole at Forest Glen Campground is one of Northern California's quiet treasures. Here, the South Fork of the Trinity River winds through a landscape of towering conifers, mossy boulders, and fern-draped banks — a world apart from the noise of everyday life. Whether you're a weekend camper or a day-tripper chasing cool water on a hot summer afternoon, Forest Glen delivers an experience that feels genuinely wild without demanding anything extreme of you.

The Setting and Landscape

The South Fork of the Trinity River runs with a clarity that stops you in your tracks. Standing on the bank, you'll look down into water that shifts from pale jade to deep emerald depending on the light and the depth. The campground hugs the river's edge, so the transition from camp chair to cool water takes all of thirty seconds. Ancient Douglas firs and pines press in from all sides, casting dappled shade across the rocky shoreline, while the scent of pine resin and river mist mingles in the warm summer air. In spring, wildflowers erupt across the surrounding hillsides in waves of color. By autumn, the canyon walls ignite with gold and amber, making this one of those rare spots that earns a return visit in every season.

Swimming and Snorkeling

The river here is approachable enough for families but rewarding enough for adventurers. You'll find pools of varying depth tucked between smooth granite boulders — shallow enough near the edges for kids to wade and splash, deeper toward the center for those who want to fully submerge. The water is cold and bracingly clear, the kind of mountain river water that makes your skin tingle and your spirits lift immediately. Snorkelers will appreciate the visibility, which reveals the stony riverbed and whatever small creatures make their home in the current. Water shoes are strongly recommended: the river bottom is rocky and uneven, and the right footwear lets you explore freely without watching every step. Note that this is an unofficial swimming spot with no lifeguards on duty, so swimmers should exercise caution, especially with children and during higher spring flows.

Plan Your Visit

Forest Glen Campground sits within Shasta-Trinity National Forest, and camping is available directly on site — meaning you can wake up twenty feet from the water and spend the whole day in and out of the river. Facilities are available at the campground, and there is currently no fee to visit, making this an exceptional value for families and budget-conscious travelers. Summer months from June through August offer the warmest temperatures and the most stable water levels, making them the prime window for swimming and snorkeling. The nearest towns include Eureka and Fortuna to the west and Redding to the east, all of which offer fuel, groceries, and lodging if you prefer a base camp with more amenities. However you arrive, Forest Glen rewards those who make the effort with one of the Trinity region's most unspoiled riverside escapes.

Getting There

Directions to Forest Glen Swimming Hole

Starting Point: Eureka, CA

  1. Begin your journey by heading south on US Route 101 from Eureka. Drive approximately 20 miles.
  2. Take Exit 685 for State Route 36 (CA-36) and turn left to head east on CA-36.
  3. Continue on CA-36 for about 62 miles. Along the way, you will enter the Shasta-Trinity National Forest. Be prepared for winding roads and scenic views as you drive through the forested area.
  4. Look for signs directing you to the Forest Glen Campground. The campground is located off CA-36 and will be clearly marked.

Parking and Final Approach:

  • Once you arrive at Forest Glen Campground, parking is available within the campground area. Follow the designated parking signs to ensure you are in an appropriate spot.
  • The swimming hole is located in the river that runs through the campground. From the parking area, walk towards the riverbank. There are no formal trails, but the river is easily accessible from the campground.

Helpful Tips:

  • Be cautious of slippery rocks near the river.
  • Bring any supplies you may need, as amenities in the area are limited.
  • Check current weather and road conditions before your trip, as CA-36 can be challenging to navigate during inclement weather.

Enjoy your visit to Forest Glen and the refreshing swimming hole!

Access Notes

This is an unofficial, natural swimming area with no designated supervision or lifeguards. Parking is within the Forest Glen Campground. All facilities are limited to those available at the campground. There is no stated fee for day use, but campground fees may apply for overnight stays.

Plan Your Visit

Parking & Access

Parking is typically available near the main access point; arrive early on weekends and avoid blocking gates or driveways. The approach follows established paths—expect uneven terrain and occasional slick rock near the waterline.

Regulations & Fees

No fee is commonly reported, but policies change—verify current access rules and hours before you go. This location is commonly accessed via public lands or established easements; stay on designated routes and follow posted rules.

Seasonality & Flow

Water levels and clarity shift with season and recent weather. After storms or snowmelt, expect stronger currents and colder water—choose calm pockets and wade carefully.

What to Bring

Bring sturdy water shoes to protect your feet on rocks and slippery surfaces. A waterproof dry bag keeps your phone, keys, and valuables safe. Pack a quick-dry towel, sun protection, and drinking water — never drink from the natural water source.

Frequently Asked Questions About FOREST GLEN

Is FOREST GLEN free to visit?

FOREST GLEN is generally free to access. No entry fee is commonly reported, though parking passes or day-use fees can be introduced — always confirm current rules before heading out.

Is swimming allowed at FOREST GLEN?

Yes, FOREST GLEN is an officially sanctioned recreation area where swimming is permitted. Reported activities include: Swimming, Snorkeling. Always respect posted closures and seasonal restrictions.

What type of swimming spot is FOREST GLEN?

FOREST GLEN is a river on South Fork of the Trinity River located in CA, near EUREKA. Plan a visit to the Forest Glen swimming hole on the South Fork Trinity River. Find directions, safety tips, and details for swimming and snorkeling.

When is the best time to visit FOREST GLEN?

The best time to visit FOREST GLEN is Summer months (June-August) for warm temperatures and stable water levels; Spring (April-May) for vibrant wildflowers; Autumn (September-November) for stunning foliage.. Water levels, clarity, and temperature vary with recent weather — always check conditions before going, especially after rain or snowmelt.

What facilities are available at FOREST GLEN?

Reported facilities at FOREST GLEN include: Forest Glen Campground provides restrooms, picnic areas, tent and RV camping options, and easy access to the swimming hole.. Amenities can change — contact the managing agency or check recent visitor reports to confirm current availability.

Is camping available near FOREST GLEN?

Camping at site.

Highlights

Clear emerald waters
Set within Shasta-Trinity National Forest
Perfect for swimming and snorkeling
Accessible from nearby towns
Camping facilities available onsite

Unique Features

Blend of rugged isolation and accessibility
Natural clarity of the South Fork Trinity River
Rich wildlife and plant life diversity
Opportunities for both adventure and relaxation

Location & Area Map

Safety Information

Important Safety Tips

River currents can be strong and water levels variable; assess conditions before entering.; Wear appropriate footwear; rocks in and out of the water are often slippery.; There are no lifeguards. Swim at your own risk and never swim alone.; Bring all necessary supplies, including water, food, and a first-aid kit.; Cell service may be limited; inform someone of your plans.

Cultural & Historical Context

Historical Background

Forest Glen’s history as a seasonal retreat for Forest Service cabin owners reflects its longstanding appeal as a place of tranquility and natural beauty.

Photography Guide

Photo Opportunities

Best spots include misty river views at sunrise, golden hues at sunset, and underwater shots for snorkelers. Spring wildflowers and autumn foliage enhance scenic photography.

Conservation & Ethics

Protect This Place

Visitors are encouraged to follow Leave No Trace principles, avoid littering, and respect local wildlife to preserve the area’s natural beauty.

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Visit Information

Best Time to Visit
Summer months (June-August) for warm temperatures and stable water levels; Spring (April-May) for vibrant wildflowers; Autumn (September-November) for stunning foliage.
Difficulty Level
Easy to moderate. The swimming hole is located within Forest Glen Campground, requiring minimal hiking. Water shoes recommended for navigating rocky terrain.
Fee
None
Facilities
Forest Glen Campground provides restrooms, picnic areas, tent and RV camping options, and easy access to the swimming hole.
Activities
Swimming, Snorkeling

Camping Information

Camping at site.

Nearby Attractions

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Safety & Responsibility

  • Assess conditions on site. Water flow, depth, and hazards change quickly.
  • Follow posted signs and local regulations. Do not trespass.
  • Never jump or dive without checking depth and underwater obstacles.
  • Swim with a buddy and consider flotation for non‑swimmers.
  • Pack out all trash; respect wildlife and fragile environments.
J
Joshua Havens
Founder & Editor, Hidden Swimming Holes

Joshua Havens created Hidden Swimming Holes to make it easier for people to find — and safely visit — natural freshwater swimming destinations across the United States. He researches access conditions, water quality resources, and land management rules so you don't have to start from scratch. He holds a strong belief that good outdoor recreation information should be accurate, honest about its limitations, and freely available.

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