# Lockhouse 22, United States: what it is and when to go > Lockhouse 22 is a mountain hut (Pennyfield Lockhouse) in United States (Herndon). Interests: Hiking. The best time to visit is April to October. In June there are 14 h 44 of daylight, and in December, 9 h 16. Here is what it is, where it lies, when to come, how to get there and what else is nearby to turn it into a trip. - Address: https://kokai.app/en/paises/america/estados-unidos/lockhouse-22/ - Reviewed on: 2026-10-08 - Language: en ## In a nutshell - **What it is:** Mountain hut · Hiking - **Local name:** Pennyfield Lockhouse - **Where:** United States · Pennyfield Lock Road 19750, 20854, Potomac - **Best time:** April to October. - **Nearest airport:** EWR Newark, 323 km as the crow flies - **Price:** 110 USD - **Website:** [canaltrust.org](https://www.canaltrust.org/programs/canal-quarters/canal-quarters-lockhouses-overview/lockhouse-22/) - **Run by:** C&O Canal Trust - **Coordinates:** 39.05363, -77.28889 ## What it is and where Lockhouse 22 is a mountain hut (Pennyfield Lockhouse) in United States (Herndon). It is in [Herndon](https://kokai.app/en/paises/america/estados-unidos/herndon/), where this site lists 40 more places to see, 8.7 km from the centre. Its coordinates are 39.05363, -77.28889; the nearest main airport is Newark Liberty International Airport (EWR, Newark), 323 km as the crow flies. How to get around United States (train, car, bus) is covered in [its country guide](https://kokai.app/en/paises/america/estados-unidos/#moverse). - [Where it is](https://www.google.com/maps/search/?api=1&query=39.053631%2C-77.288887) - [Directions](https://www.google.com/maps/dir/?api=1&destination=39.053631%2C-77.288887) - **Run by:** C&O Canal Trust It is one of the [Hiking](https://kokai.app/en/paises/america/estados-unidos/senderismo/) places in United States. In [Kokai](https://kokai.app/en/) it is already on your trip map next to the places you save yourself, and it goes into a day's plan with one tap. ## When to go The best time to visit Lockhouse 22 is **April to October**. | Mes | Época | Hours of daylight | | --- | --- | --- | | January | Possible | 9 h 33 | | February | Possible | 10 h 32 | | March | Possible | 11 h 42 | | April | Best time | 13 h 02 | | May | Best time | 14 h 08 | | June | Best time | 14 h 44 | | July | Best time | 14 h 29 | | August | Best time | 13 h 32 | | September | Best time | 12 h 14 | | October | Best time | 10 h 57 | | November | Possible | 9 h 49 | | December | Possible | 9 h 16 | In June there are 14 h 44 of daylight, and in December, 9 h 16. Daylight hours are calculated from the site's latitude for the 15th of each month; when planning a full day on foot they matter as much as the weather. When to go to United States in general, with its festivals and peak seasons, is in [its country guide](https://kokai.app/en/paises/america/estados-unidos/#cuando-ir). ## Before you go to United States To enter United States there are 9 things to sort out before you leave, starting with “Book national parks and cars in advance”: they are all, with their deadlines, in [the United States checklist](https://kokai.app/en/paises/america/estados-unidos/#antes-de-salir). Currency: US dollar (USD); plugs: Type A and B · 120 V · 60 Hz (you need an adapter, and check your devices' voltage); emergencies: 911 for everything. In [Kokai](https://kokai.app/en/) you tick off the checklist inside your trip, and each item reminds you when it is time to do it. ## What is nearby - [Pennyfield Lock](https://kokai.app/en/paises/america/estados-unidos/lock-22-pennyfield-lock/): Lock on the Chesapeake & Ohio Canal in Travilah, Maryland, United States · 15 m - [Riley's Lock](https://kokai.app/en/paises/america/estados-unidos/lock-24-rileys-lock/): Dam in Montgomery County, Maryland, United States · 4.8 km - [Seneca Quarry](https://kokai.app/en/paises/america/estados-unidos/seneca-quarry/): Historical Seneca red sandstone quarry in Montgomery County, Maryland, United States · 5.1 km - [Rocklands Farm Winery](https://kokai.app/en/paises/america/estados-unidos/rocklands-farm-winery/): Winery · 6.7 km - [Seneca Creek State Park](https://kokai.app/en/paises/america/estados-unidos/seneca-creek-state-park/): State park in Montgomery County, Maryland, United States · 7.2 km Distances are as the crow flies. Everything else is in [the United States guide](https://kokai.app/en/paises/america/estados-unidos/). ## More in United States: Hiking - [Appalachian Trail](https://kokai.app/en/paises/america/estados-unidos/appalachian-trail/): 2,198.4-mile (3,538 km) trail going through fourteen US states managed by the National Park Service - [Pacific Crest Trail](https://kokai.app/en/paises/america/estados-unidos/pacific-crest-trail-2/): long-distance hiking and equestrian trail in the USA - [Ala Kahakai National Historic Trail](https://kokai.app/en/paises/america/estados-unidos/ala-kahakai-national-historic-trail/): historic Place in Hawaii County, Hawaii - [Hager Mountain](https://kokai.app/en/paises/america/estados-unidos/hager-mountain/): mountain in Oregon, United States of America - [North Country Trail](https://kokai.app/en/paises/america/estados-unidos/north-country-national-scenic-trail-ny/): long-distance hiking trail in the United States - [American Discovery Trail](https://kokai.app/en/paises/america/estados-unidos/adt-maryland-seg-3/): long-distance hiking and biking trail across the United States Every United States place under Hiking, each with its season, is on [its page](https://kokai.app/en/paises/america/estados-unidos/senderismo/). ## Frequently asked questions ### What is Lockhouse 22? It is a mountain hut (Pennyfield Lockhouse in the local language) in United States. ### When is the best time to visit Lockhouse 22? April to October. In June there are 14 h 44 of daylight, and in December, 9 h 16. ### How do you get to Lockhouse 22? The nearest main airport is Newark Liberty International Airport (EWR), 323 km as the crow flies. From there, [directions](https://www.google.com/maps/dir/?api=1&destination=39.053631%2C-77.288887) opens the route on the map, and how to get around United States is explained in [its country guide](https://kokai.app/en/paises/america/estados-unidos/#moverse). ### How do I add it to my trip? With one tap. In Kokai it is already on the United States map, next to the places you save yourself: add it to a day's plan, give it a time and, if you like, get a reminder when you pass nearby. ### What else is around here? Nearby you have [Pennyfield Lock](https://kokai.app/en/paises/america/estados-unidos/lock-22-pennyfield-lock/), [Riley's Lock](https://kokai.app/en/paises/america/estados-unidos/lock-24-rileys-lock/), [Seneca Quarry](https://kokai.app/en/paises/america/estados-unidos/seneca-quarry/). The rest is in [the United States guide](https://kokai.app/en/paises/america/estados-unidos/). Data from [OpenStreetMap](https://www.openstreetmap.org/way/411222691), licensed under the ODbL. Daylight hours are calculated from the latitude. More in [credits](https://kokai.app/en/aviso/#creditos).