The woods open up to a wide clearing carpeted entirely with gray sandstone boulders. The blocks rest at all angles on others below, looking as if they were recently jumbled. The edge of the woods is a distinct line, with only rare islands of trees interrupting the blockfield's barren expanse.
Dimensions The clearing is about 150 yards (m) across and 500 yards long, about 16 acres in area. Boulders in the field are 2-6 feet (0.5-3 m) in diameter, with some larger slabs as much as 20 feet (6 m) across.
Spaces between the boulders are empty: no soil can be reached even by delving several layers down. The lack of a soil fill makes some of the boulders unstable when stepped on, because they rest only on a few corners of rocks below.
Sandstone making up most of the boulders is coarse in texture, including some grains as large as peas. The rock surfaces are rough enough to provide good traction for any kind of footwear. Some boulders are composed of conglomerate, a sandstone-like rock densely packed with gravel and pebbles.
At the field's edges, rock-strewn ground extends some distance beneath tree trunks and brush, but with soil showing between boulders.
This field can only be crossed on foot or by flying. It is impassable to mounts or vehicles (even large-wheeled or tracked vehicles would likely become stuck after, at most, tens of yards (meters) of progress.
Movement across the field is slow, in carefully selected long steps and jumps from one boulder top to another. Any ill-considered step in a gap between boulders could result in scrapes or a twisted ankle. Someone sitting on a boulder top out in the field could only be approached at a leisurely pace from any direction.
To stay out of view of enemies that are standing on the blockfield surface some distance away (at least 100 feet, 30 m), a character can lie down in one of the low spots between larger boulders, below the field's general surface horizon. This gives no concealment from aerial views. Such spots are everywhere on the field's surface, and might be used to sneak across the field in a series of short scrambles, drops, and crawls. Anyone doing this would risk noise and loss of balance from an unstable boulder tilting under their weight.
In rare locations, a wide rock slab roofs over an empty space which could provide two or three adults (more children) with complete hiding and some degree of shelter from the elements.
Hickory Run Boulder Field, Hickory Run State Park, Pocono uplands of eastern Pennsylvania. Most direct access is by an unpaved park road and short foot trail.