
Cumberland Hill
EasyPublic LandCumberland · Providence County · 0.8 mi from Cumberland
41.98034, -71.48560
A gentle hillside locality in northern Rhode Island known for collecting quartz, feldspar, and mica specimens. Popular with amateur collectors exploring New England's granitic bedrock.
Cumberland Hill offers rockhounds access to outcrops and exposed ledge typical of the Rhode Island granite formations that underlie much of the state. The site features a gentle slope at 207 feet elevation, making it accessible for collectors of various skill levels. The granitic bedrock here contains quartz veins, feldspar crystals, and mica sheets that weathered from the host rock. This area sits within the Narragansett Basin physiographic province, where Precambrian and Paleozoic granitic intrusions created the mineral-rich bedrock seen today.
The locality has long attracted local amateur collectors interested in Massachusetts and Rhode Island mineral specimens. Visitors typically work along outcrops and weathered talus slopes, looking for quartz, pink feldspars, and mica flakes. The terrain is relatively easy to navigate, with gentle grades that do not require technical climbing or scrambling.
Best collecting occurs after weathering has loosened crystals from the host rock. The site remains productive year-round for patient collectors willing to examine ledge closely and work weathered material at the base of outcrops. Access is straightforward from town, making this an ideal destination for families and beginners exploring New England rockhounding.
Cumberland Hill sits within the Narragansett Basin, where Precambrian granitic rocks were intruded roughly 600-500 million years ago. These granitic masses form the basement rock of Rhode Island and contain the quartz, feldspar, and mica crystals found by modern collectors. Local rockhounds have worked this site informally for decades as part of the broader New England amateur mineral collecting tradition.
Elevation 207 feet with gentle slope throughout. Granitic bedrock with scattered outcrops and talus at base of rise. Vegetation typical of southern New England - mixed oak and pine woodland. Footing generally easy on sloped terrain; no steep drops or significant obstacles. Walking distance from parking estimated 0.5 to 1.5 miles depending on exact parking and target outcrop.
Search along the base of exposed ledge and talus slopes where weathering has loosened quartz and feldspar crystals - do not hammer into solid rock. Use a hand lens to identify clear quartz points and pink feldspar faces in weathered material. Look for mica sheets in decomposing granite; they often peel out naturally from the granular host rock. Bring a small hammer and chisel for sampling, but focus on already-loose specimens first.
From Hopkinton, head south toward Cumberland Hill. Use Prospect Street or King Street as your primary routes heading in that general direction, as these are the nearest major roads to the site. The rockhounding area is approximately 17 miles south of Hopkinton. Use the GPS coordinates and a navigation app for the final approach.
April - November, with peak collecting in spring and fall when rain and freeze-thaw cycles have weathered crystals loose. Summer heat is mild in Rhode Island. Winter frost can aid weathering but snow and cold may reduce comfort.
Paved road (Cumberland Hill Road) to parking area. No specialized vehicle required.
Roadside pullout or street parking near the base of Cumberland Hill. Limited capacity; during peak times may require parking on nearby residential streets with permission.
Cumberland town center, approximately 0.8 miles south. Gas, food, and water available at convenience stores and restaurants in town.
Relatively flat to gently sloped terrain accessible to most visitors. Unpaved surface with grass, leaf litter, and scattered loose rock. No wheelchair access to the main collecting areas on the slope. Sturdy walking shoes recommended; uneven footing common. A 6+ year old in reasonable shape can easily access this site.
This is an informal public collecting site. Collect only loose material and small specimens that have already weathered from the host rock. Do not hammer on solid ledge or blast rock faces. Respect private property adjacent to the hill. Take only what you can carry. Leave the site in good condition for future collectors.
Collect loose material only Do not hammer exposed ledge Respect private property boundaries No commercial collection Take only personal use quantities















