![Bench installers](https://candocanal.org/wp-content/uploads/2020/05/bench-installers.jpg)
Volunteering to help the park: A work crew installs a bench near Great Falls in 2016.
![Catoctin Aqueduct after collapse](https://candocanal.org/wp-content/uploads/2020/01/hrp-Catoctin-1973.jpg)
Supporting park projects: Catoctin Aqueduct after collapse in 1973
![Catoctin Aqueduct restored](https://candocanal.org/wp-content/uploads/2020/01/hrp-Catoctin-rebuilt.jpg)
Supporting park projects: Catoctin Aqueduct after restoration effort in 2011
![Sideling Hill Creek Aqueduct](https://candocanal.org/wp-content/uploads/2020/09/IMG_6185.jpg)
Exploring history and nature: Sideling Hill Creek Aqueduct as viewed from the Western Maryland Rail Trail.
![Picketing on towpath](https://candocanal.org/wp-content/uploads/2020/01/hrp-gu-sign.jpg)
Protecting the canal since 1954: The association opposes Georgetown University’s plan to build a large boathouse in the park
![Bicyclist examines banner](https://candocanal.org/wp-content/uploads/2020/01/hrp-gu-banner.jpg)
Protecting the canal since 1954: The association opposes Georgetown University’s plan to build a large boathouse in the park
![Group ready to hike](https://candocanal.org/wp-content/uploads/2020/09/IMG_1257.jpg)
Exploring history and nature: Hikers gather at Fifteen Mile Creek Aqueduct in 2018.
![Hikers sitting on lock gate](https://candocanal.org/wp-content/uploads/2020/01/hrp-immortal9.jpg)
Protecting the canal since 1954: Justice Douglas and eight others pause during their famous hike, which publicized the canal in 1954
![Stone Cutting Mill Interpretation](https://candocanal.org/wp-content/uploads/2020/09/IMG_2499crop-scaled.jpg)
Exploring history and nature: Ranger provides interpretation for hikers at Seneca Stone Cutting Mill in 2020.
![Hikers embrace a tree](https://candocanal.org/wp-content/uploads/2020/01/hrp-tree.jpg)
Exploring history and nature: Hikers marvel at a large specimen during a tree identification walk in 2012
![Volunteer attaches plaque to bench](https://candocanal.org/wp-content/uploads/2020/09/04-Jim-Heins-attaches-the-plaque.jpg)
Volunteering to help the park: Association volunteer attaches plaque to newly installed bench in 2018.
![Hikers near Great Falls Tavern](https://candocanal.org/wp-content/uploads/2020/01/hrp-2009hike-end.jpg)
Exploring history and nature: Association members participate in the last day of the 2009 Thru Hike at Great Falls
![Installing a sign](https://candocanal.org/wp-content/uploads/2020/01/hrp-landers.jpg)
Volunteering to help the park: Association member helps install an identification sign at Landers in 2011
![Hikers at Dam 5](https://candocanal.org/wp-content/uploads/2020/09/IMG_1966-scaled.jpg)
Exploring history and nature: Hikers gather at Dam 5 in 2019.
![Protesting along the canal](https://candocanal.org/wp-content/uploads/2020/01/hrp-Douglas-group.jpg)
Protecting the canal since 1954: Justice Douglas and others rally against replacing the canal with a highway.
![Painting a table](https://candocanal.org/wp-content/uploads/2020/01/hrp-Swains.jpg)
Volunteering to help the park: Association members repaint picnic tables at Swains Lock
![Volunteers assemble picnic table](https://candocanal.org/wp-content/uploads/2020/09/07-Picnic-table-assemblers.jpg)
Volunteering to help the park: Association volunteers assemble picnic table in 2018.