Grindstone Run Tributary to Slippery Rock Creek
Location of Grindstone Run mouth Show map of Pennsylvania Grindstone Run (Slippery Rock Creek tributary) (the United States) Show map of the United States
Location
Country	United States of America
State	Pennsylvania
County	Lawrence
Township	Perry
Physical characteristics
Source	divide between Slippery Rock Creek and Camp Run
• location	about 3 miles north of Pyles Mills, Pennsylvania in Perry Township
• coordinates	40°54′28″N 80°10′49″W / 40.90778°N 80.18028°W / 40.90778; -80.18028[1]
• elevation	1,260 ft (380 m)[2]
Mouth	Slippery Rock Creek
• location	about 1 mile upstream on Slippery Rock Creek from Harris Bridge in McConnells Mill State Park
• coordinates	40°55′13″N 80°12′01″W / 40.92028°N 80.20028°W / 40.92028; -80.20028[1]
• elevation	920 ft (280 m)[2]
Length	1.3 mi (2.1 km)[3]
Basin size	1.0 square mile (2.6 km2)[4]
Discharge
• average	1.32 cu ft/s (0.037 m3/s) at mouth with Slippery Rock Creek[4]
Basin features
Progression	Slippery Rock Creek → Connoquenessing Creek → Beaver River → Ohio River → Mississippi River → Gulf of Mexico
River system	Beaver River
Tributaries
• left	unnamed tributaries
• right	unnamed tributaries
Bridges	Mountville Road

Grindstone Run is a small tributary of Slippery Rock Creek in western Pennsylvania. The stream rises in eastern Lawrence County flows northwest into Slippery Rock Creek in McConnells Mill State Park.

• List of rivers of Pennsylvania