- Elevation, modelled
- 51 m
- Tallest summit within 25 miles
- Sugarloaf Mountain387 m · 17.9 mi
- Nearest byway
- Chesapeake and Ohio Canal Byway0.3 mi off
- Sunset, June solstice
- 20:39local time
- Coordinates
- 39.0312, -77.2435
Lock 21: Swains Lock is a attraction in Maryland, at a modelled 51 m. Sugarloaf Mountain stands 387 m to the north-northwest, 18 miles off. The nearest named place is Riverbend Park Nature Center, a attraction 0.7 miles away. Chesapeake and Ohio Canal Byway passes 0.3 miles off. 53 named summits stand within 25 miles.
lock and lock keeper's house located in Chesapeake and Ohio Canal National Historical Park
Dates from 1830.
Wikidata Q34953489, matched on coordinates and name (23 m apart).
Summits around it
The highest named summits within 25 miles of Lock 21: Swains Lock. Elevation from each summit’s own record; bearing measured between the two coordinates.
| Summit | Bearing | Elevation | Distance |
|---|---|---|---|
| Sugarloaf Mountain | NNW 333° | 387 m | 17.9 mi |
| Waterford Peak | WNW 301° | 361 m | 20.6 mi |
| Pine Rock | NW 322° | 346 m | 24.9 mi |
| Bald Mountain | NW 307° | 235 m | 21.7 mi |
| Hogback Mountain | WNW 283° | 187 m | 20.0 mi |
| Steptoe Hill | W 271° | 176 m | 23.3 mi |
| Hunting Hill | NNE 33° | 156 m | 4.4 mi |
| Gantt Hill | S 176° | 156 m | 7.3 mi |
- 0.3 mi off the Chesapeake and Ohio Canal Byway
- 3.2 mi off the Old Georgetown Pike
- 5.7 mi off the George Washington Memorial ParkwayNational
- 12.2 mi off the Antietam Campaign Byway
Overlooks nearby
Named places within 25 miles
- Riverbend Park Nature Center: 0.7 mi
- Lock 20: 2.2 mi
- Lock 19: 2.3 mi
- Lock 18: 2.3 mi
- Maryland Mine: 2.6 mi
- Glenstone Museum: 1.9 mi
- Colvin Run General Store: 5.0 mi
- Blacksmith Shop: 5.1 mi
- Colvin Run Mill House: 5.1 mi
- Colvin Run Mill: 5.1 mi
- Mather Gorge: 2.7 mi
- Mather Gorge marker: 2.7 mi
- Ruins of Worker's Houses for Nearby Quarries: 4.8 mi
- Burling Defenders: 5.0 mi
- The River of Blood: 5.4 mi
- Prospect Hill: 4.4 mi
- Hunting Hill: 4.4 mi
- Gantt Hill: 7.3 mi
- Freedom Hill: 7.5 mi
- Nokes Hill: 8.6 mi
- Great Falls: 2.4 mi
- Scott's Run Falls: 4.9 mi
- Stubblefield Falls: 5.0 mi
- Brambleton Sign/Water Decoration: 15.7 mi
- Coe Creek: 21.9 mi
- Sycamore Beach: 3.4 mi
- Purplehorse Beach: 3.4 mi
- Fishing Shore: 11.4 mi
- Lake Barcroft Beach: 13.7 mi
- Manassas Safety/Rest Area West: 20.4 mi
- Manassas Safety/Rest Area East: 20.5 mi
- Truck Rest Area: 23.3 mi
| Date | Sunrise | Golden hour | Sunset |
|---|---|---|---|
| March equinox | 07:13 | 18:46 | 19:21 |
| June solstice | 05:44 | 19:59 | 20:39 |
| September equinox | 06:57 | 18:33 | 19:08 |
| December solstice | 07:25 | 16:08 | 16:50 |
Local time (America/New_York).
Day trips start here
- Potomac · 2 mi
- Great Falls · 3 mi
- Rockville · 6 mi
- Gaithersburg · 7 mi
- Bethesda · 8 mi
- McLean · 8 mi
Take the scenic way to Lock 21: Swains Lock.
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