DUNDERBERG MOUNTAIN
Route 9W/202, Rockland County, NY


Directions:

There are four parking areas along Route 9W/202 for four different trails:

1) just north of the road to Ional Island parking for the blue-blazed Cornell Mine Trail;

2) just south of Jones Point for the red dot-blazed Ramapo-Dunderberg Trail;

3) a little ways south of the #2 parking area for the blue-blazed Timp-Torne Trail;

4) south of the Anchor Monument (across the railroad tracks on the river bank) for the red-blazed 1777 Trail. 


Geology:

Dunderberg Mountain, the backbone of Jones Point, is on the upthrown, or Hudson Highlands side of the Thiells fault and is held up by granitic gneiss similar to that of Bear Mountain and Storm King Mountain.  (Van Diver 1985: 65) 


History:

Colonial Period  --  some iron mines up in the hills back of Dunderberg.

1777  (October 6) --  the 1777 Trail marks the route taken by the British under Sir Henry Clinton to attack forts Montgomery and Clinton).

1889  --  Henry J Mumford comes to the area looking for a place to place a "Switch Back" railroad. Mumford and his brother operated a scenic "Switch Back" railroad in Mauch Chunk (now Jim Thorpe), Pennsylvania,. This type of railroad was a popular tourist attraction in the second half of the 19th century.  Mumford thought he could attract many visitors with a spiral railway in the greater New York City Metropolitan Area.  Visitors could come to Dunderberg via excursion rides on the Hudson River steamboats.

1890  --  a million dollars was invested in the construction of the Dunderberg Spiral Railway that began this year.  The money ran out and the work was closed.  

1906-1908  --  William Thompson Howell, hiker and photographer, re-discovered the Spiral Railway.  He went up today's Bockberg Trail and down the Jones Trail to find the abandoned railway works.

1910  --  the clearing around the inclined planes was still visible .

1933 and 1934  --  extracts of Howell's diaries  published as two volumes called The Hudson Highlands.

1978  --  park official Gordon J Thompson reported "with noted exceptions, the grade is in excellent condition and could be envied by the county's operating railroads".

1982  --  Howell's diary extracts reprinted by the Walking News.

(Source: for a fuller account see Dunderberg Spiral Railway --   http://www.columbia.edu/~brennan/dunderberg/begin.html)

The Timp-Torne Trail follows one of the graded sections of the spiral railway.