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Hiking trails & Routes
United States
Florida
Alachua County

River Sink Trail and Alligator Road Loop

Moderate

4.7

(9468)

9,469

hikers

River Sink Trail and Alligator Road Loop

02:31

9.96km

10m

Hiking

The River Sink Trail and Alligator Road Loop offers a fascinating journey through Florida's unique karst landscape and wetland habitats. You'll traverse natural paths, witnessing the Santa Fe River disappear into a sinkhole, a geological marvel, and cross the historic Swinging Bridge. Expect to see diverse flora, including cypress trees…

Last updated: June 9, 2026

Waypoints

A

Start point

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1

1.03 km

O'Leno State Park.

Highlight • Forest

The park itself encompasses over 6,000 acres of diverse landscapes. Hike or bike along shady trails that wind through hardwood hammocks, wetland swamps, and sandhill habitats. You can even witness …

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2

1.45 km

River Sink

Highlight • Natural Monument

The crown jewel of O'Leno State Park is undoubtedly the River Sink. Here, the mighty Santa Fe River takes a dramatic turn and vanishes underground! The rushing water seems to …

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3

2.12 km

Swinging Bridge

Highlight • Bridge

Built during the New Deal era, it's one of the few suspension bridges remaining in Florida. As you cross, you can admire the scenic views of the Santa Fe River below.

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B

9.96 km

Sweetwater Lake

Highlight • Lake

Fed by crystal-clear springs, Sweetwater Lake is known for its calm waters and lush surroundings. Unlike some of the developed campgrounds in O'Leno, Sweetwater Lake offers a more rustic camping …

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Way Types & Surfaces

Way Types

7.41 km

2.54 km

Surfaces

6.71 km

3.17 km

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Elevation

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Weather

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Today

Wednesday 8 July

34°C

23°C

41 %

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Max wind speed: 15.0 km/h

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Frequently Asked Questions

Where is the River Sink Trail and Alligator Road Loop located?

This Komoot tour, named "River Sink Trail and Alligator Road Loop," primarily focuses on the River Sink Trail located within O'Leno State Park in Florida. While the name includes "Alligator Road Loop," that refers to a separate scenic drive in Big Cypress National Preserve, which is not part of this specific hiking route.

What is the difficulty level of this hike?

This hike is rated as moderate. While the River Sink Trail itself is often described as a serene and relatively easy walk, this Komoot tour covers approximately 10 km (6.2 miles) and includes varied terrain within O'Leno State Park, making it a good option for those seeking a peaceful trek with a bit more distance.

What are the main attractions along the route?

The route offers several unique natural and historical features. You'll experience the geological wonder of the River Sink, where the Santa Fe River disappears underground. Another highlight is the historic Swinging Bridge, built by the Civilian Conservation Corps in the 1930s. You'll also pass by Sweetwater Lake and traverse diverse natural communities within O'Leno State Park.

What kind of terrain can I expect on the trail?

The trail winds through diverse natural communities, including scrubby flatwoods, sandhill, floodplain swamp, and forest. You'll follow the "coffee-colored" Santa Fe River, encounter sinkholes and creeks, and walk through areas shaded by various trees. Expect to see cypress trees with their distinctive "knees" in lower-lying areas. In spring, wild azaleas add vibrant color.

Is there an entrance fee or permit required for O'Leno State Park?

Yes, O'Leno State Park, where this trail is located, typically charges an entrance fee per vehicle. Permits are generally not required for day hiking on established trails, but it's always advisable to check the official Florida State Parks website for the most current fee information and any specific regulations before your visit.

What is the best time of year to hike this trail?

The cooler, drier months from late fall through early spring (November to April) are generally the most pleasant for hiking in Florida, offering comfortable temperatures and fewer insects. During spring, you might also catch the vibrant bloom of wild azaleas along the trail.

Are dogs allowed on the River Sink Trail?

Dogs are generally allowed on trails in Florida State Parks, including O'Leno State Park, but they must be kept on a leash no longer than 6 feet at all times. Please remember to clean up after your pet to help keep the park beautiful for everyone.

Where can I park to access the trailhead?

Parking is available within O'Leno State Park. Upon entering the park, follow signs for the River Sink Trail or visitor parking areas. There are designated parking lots that provide access to the trail system.

What kind of wildlife might I see?

While specific sightings are never guaranteed, the diverse ecosystems of O'Leno State Park support various wildlife. You might spot birds, turtles, and other small animals. Keep an eye out for alligators or other reptiles near water bodies, though they are not as prolific here as in the Big Cypress area.

Does this trail connect with other paths?

Yes, this Komoot route utilizes sections of several official trails within O'Leno State Park. You will hike along parts of the River Sink Trail, Alligator Road, and Old Bellamy Road, offering a comprehensive experience of the park's trail network.

Is this hike suitable for children?

Given its moderate difficulty and approximately 10 km (6.2 miles) length, this hike is generally suitable for older children or those accustomed to longer walks. The varied scenery, including the River Sink and Swinging Bridge, can be engaging for families, but younger children might find the full loop challenging.

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