Shawkemo meant "little field of land" to the local natives. The Shawkemo Hill Trail is actually a series of paths which loop through the deepest glacial valley on the island and can lead you to one of the highest peaks of the glacial moraine (the edge of the ice sheet that formed Nantucket). This dramatic hike also serves as a gateway to the extensive walking paths and sand roads of the Middle Moors, widely regarded as the heart of wild Nantucket.
After a heavy rain, ardent treasure hunters should keep their eyes open for ancient arrowheads along the trails of the middle moors as this part of the island is where the former resident native population hunted for food for over six thousand years. Of course, you may be distracted from your treasure hunting by the views; one of the Middle Moors Gateway paths passes over the top of Shawkemo Hill (a.k.a., Radar Hill) and provides a dramatic panoramic lookout over the moors and Nantucket Harbor.
After finding the cache I encourage you to continue exploring the area's numerous well marked paths. There are two benchmarks near this geocache (LW4179.)
Here is a map and area info in case you want to seek other geocaches from here:
http://www.nantucketlandbank.org/Map/Trails/10_shawkemo.pdf