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Routes
Hiking trails & Routes
United States
New York
Orange County

Blue Disc and Ramapo Dunderberg Loop

Moderate

4.7

(3728)

13,625

hikers

Blue Disc and Ramapo Dunderberg Loop

02:55

10.1km

250m

Hiking

The Blue Disc and Ramapo Dunderberg Loop offers a diverse hiking experience through Harriman State Park, guiding you over varied terrain from rocky inclines to old, eroded roads. You'll navigate the

Last updated: June 9, 2026

Waypoints

A

Start point

Train Station

Get Directions

1

5.68 km

Claudius Smith's Den

Highlight • Cave

Claudius Smith was a thief who is known to have used these caves as a hideout during the Revolutionary War. From the top of the cave, you get a nice view of the park and surrounding hills.

Tip by

B

10.1 km

End point

Train Station

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Way Types & Surfaces

Way Types

8.17 km

1.82 km

< 100 m

Surfaces

8.17 km

1.60 km

126 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.

Highest point (310 m)

Lowest point (120 m)

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Weather

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Today

Wednesday 8 July

28°C

15°C

0 %

Additional weather tips

Max wind speed: 8.0 km/h

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Frequently Asked Questions

Where can I park to access the Blue Disc and Ramapo Dunderberg Loop?

Specific parking information for this loop can vary. It's generally recommended to check official Harriman State Park resources or local trail guides for the most up-to-date parking areas and any potential fees. Arriving early, especially on weekends, is often a good strategy to secure a spot.

Are there any permits or entrance fees required for hiking in Harriman State Park?

While there are generally no specific hiking permits required for day use on trails within Harriman State Park, some areas or facilities might have fees. It's always a good idea to check the official New York State Parks website for the latest information on park regulations, fees, and any specific requirements for Harriman State Park before your visit.

What is the terrain like on this loop?

The terrain on this loop is quite varied, offering a dynamic hiking experience. You'll encounter switchbacks, old woods roads, and sections crossing gas lines. Expect numerous rock scrambles and stream crossings, particularly on the Ramapo-Dunderberg portions. The Blue Disc Trail itself climbs two mountains, 'Almost Perpendicular' and Pound Mountain, featuring areas with eroded roads and glacially-scoured bedrock.

What scenic views or landmarks will I see on the trail?

You'll be treated to beautiful panoramic views throughout Harriman State Park. Highlights include vistas of Lake Skenonto and commanding views of the Hudson River. Notable natural rock formations along the Blue Disc Trail are Elbow Brush and Claudius Smith Rock. From Dunderberg Mountain, you can enjoy views of the Bear Mountain Bridge. Don't miss Claudius Smith's Den, a historical cave feature.

Is the Blue Disc and Ramapo Dunderberg Loop dog-friendly?

Harriman State Park generally allows dogs on trails, but they must be kept on a leash at all times. Always ensure your dog is under control and that you clean up after them. Check the park's official website for any specific restrictions or updated regulations regarding pets.

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

This loop can be enjoyed in various seasons. Spring offers lush greenery and flowing streams, while autumn provides spectacular fall foliage. Summer is popular but can be warm, so start early. Winter hiking is possible but requires appropriate gear for potentially icy or snowy conditions, especially on rock scrambles. An early-season hike is described as 'not too difficult' for this specific loop, suggesting spring can be a good choice.

Does this loop connect with other trails in Harriman State Park?

Yes, this route utilizes several established trails within Harriman State Park. It primarily follows sections of the Blue Disc Trail and the Ramapo Dunderberg Trail. You may also find it intersects with or briefly uses parts of the Kakiat Trail, Tuxedo - Mt. Ivy Trail, White Cross Trail, Triangle Trail, Orange Trail, and Victory Trail.

Are there any historical features along the route?

Yes, the trails making up this loop have a rich history. The Blue Disc Trail dates back to the 1920s, with its official blazes established in 1943. The Ramapo-Dunderberg Trail is even older, established in 1920. Portions of the Ramapo-Dunderberg Trail offer a sense of solitude and feature historical elements like the abandoned Dunderberg Spiral Railway tunnels.

Is the loop suitable for families with children?

Given the varied terrain, which includes rock scrambles and significant elevation changes, this loop is generally considered moderate to strenuous. While adventurous families might enjoy it, it might be challenging for very young children or those new to hiking. Consider the fitness level and experience of your group before attempting the full loop. Shorter, less strenuous options might be available within Harriman State Park for families seeking an easier outing.

Are there amenities or towns nearby for supplies?

Yes, Harriman State Park is accessible from several towns that offer amenities. Towns like Tuxedo, Sloatsburg, and Warwick, New York, are relatively close and can provide options for food, drinks, and other supplies before or after your hike.

Are there any specific sections of the trail that are particularly challenging or require extra caution?

Yes, hikers should be prepared for several challenging sections. The Blue Disc Trail includes climbs up 'Almost Perpendicular' and Pound Mountain, which can be demanding. The Ramapo-Dunderberg portions are known for numerous rock scrambles and stream crossings, which require careful footing and can be slippery, especially after rain. Always wear appropriate hiking footwear and be mindful of trail conditions.

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