#77 of the LakePA 100 · South Central
Long Arm Reservoir
York and Adams counties · South Central region · 225 acres
Quiet Water Checked Oct 2026
- Size
- 225 acres as listed by the Fish and Boat Commission's PA Lakes map
- Boat traffic
- Quiet water: paddle craft and electric-motor boats only. As listed by the Fish and Boat Commission's access map, checked Oct 2026.
- Permit
- Run by Hanover Water Company. Check its rules. (PA's launch-permit rule applies at PFBC and state park/forest launches.) Paddling rules →
- Dam
- This lake is held back by a dam. Stay well away from the dam, spillway and outlet structures.
Where to put in
Long Arm Dam, Lawrence B. Sheppard Reservoir access area
Ramp · ramp
39.75122, -76.99071 (about ±50 m)
Parking: 10 spaces or more
Run by Hanover Water Company. Check its rules. (PA's launch-permit rule applies at PFBC and state park/forest launches.)
Access notices
No access notice on file (we last checked Oct 4, 2026). Check PFBC PA Lakes page before you go.
About Long Arm Reservoir
Long Arm Reservoir is number 77 on the LakePA 100: a 225-acre reservoir in York and Adams counties, in our South Central region. Some sources list it as Long Arm Dam. The acreage comes from the Fish and Boat Commission's PA Lakes map. It is Quiet Water: paddle craft and electric-motor boats only. (Boat rules as listed by the Fish and Boat Commission's access data.) You launch at Long Arm Dam, Lawrence B. Sheppard Reservoir access area, which has a launch ramp and parking listed as 10 spaces or more. The listed launches are run by Hanover Water Company, so check its rules before you go. It is held back by a dam: stay well clear of the dam, the spillway and the outlet structures. Logging it moves you toward the South Central region milestone. As the crow flies, the closest put-in is about 20 miles from York. Check the weather, posted signs and the operator's latest notices before you launch.
Rules for paddlers
Pennsylvania's paddler rules (permits, life jackets, whistle and light) are on one dated page. Paddling rules →
Safety
Paddling has real risks. Wear your life jacket. Pennsylvania requires it to be worn on canoes, kayaks and paddleboards from Nov 1 through Apr 30, and by children 12 and under all year. Check the weather, posted signs and the operator's notices before you launch. Stay well away from dams, spillways and outlet structures. You paddle at your own risk.
Nearby on the list
Straight-line distance between the lakes, not driving distance.
Questions about Long Arm Reservoir
Where do I put in at Long Arm Reservoir?
Long Arm Reservoir has one listed put-in: Long Arm Dam, Lawrence B. Sheppard Reservoir access area. Long Arm Dam, Lawrence B. Sheppard Reservoir access area is at 39.75122, -76.99071 with ramp; parking: 10 spaces or more.
Are motorboats allowed on Long Arm Reservoir?
Quiet water: paddle craft and electric-motor boats only. As listed by the Fish and Boat Commission's access map, checked Oct 2026.
Do I need a launch permit at Long Arm Reservoir?
Long Arm Reservoir's listed launches are run by Hanover Water Company; check its rules. Pennsylvania's launch-permit rule applies at PFBC and state park or forest launches.
How big is Long Arm Reservoir?
225 acres, as listed by the Fish and Boat Commission's PA Lakes map.
Sources
- PFBC PA Lakes map (lake layer) — checked Oct 4, 2026
- Fish and Boat Commission access map — checked Oct 4, 2026
- USACE National Inventory of Dams (Lawrence Baker Sheppard, PA00872) — checked Oct 4, 2026
- USGS National Hydrography Dataset — checked Oct 4, 2026
Every fact on this page comes from these public sources. Posted signs and official notices always control.
Share this lake
Download the lake card (1080×1350)
For your post or story. #LakePA100