Lewis and Clark National Historical Park

Fort Clatsop was the encampment of the Lewis and Clark Expedition in the Oregon Country near the mouth of the Columbia River during the winter of 1805–1806. Located along the Lewis and Clark River at the north end of the Clatsop Plains approximately 5 miles (8.0 km) southwest of Astoria, the fort was the last encampment of the Corps of Discovery, before embarking on their return trip east to St. Louis. The Lewis and Clark Expedition wintered at Fort Clatsop before returning east to St. Louis in the spring of 1806. It took just over three weeks for the Expedition to build the fort, and it served as their camp from December 8, 1805 until their departure on March 23, 1806.The site is now protected as part of the Lewis and Clark National Historical Park, part of which was formerly known as Fort Clatsop National Memorial until 2004. The original Fort Clatsop decayed in the wet climate of the region but was reconstructed for the sesquicentennial in 1955 from sketches in the journals of William Clark. The replica lasted for fifty years, but was severely damaged by fire in early October 2005, weeks before Fort Clatsop's bicentennial. A new replica, more rustic and rough-hewn, was built by about 700 volunteers in 2006; it opened with a dedication ceremony that took place on December 9. The site is currently operated by the National Park Service.

Astoria Marine Construction (AMCCO) was founded as Astoria Shipbuilding by Joe Dyer is 1929 in Jeffers Gardens of Astoria, Oregon. Joe Dyer's father was a pioneer of early Astoria and operated a family sawmill. Joe Dyer started by building wooden fishing boats at his shipyard. Then added wooden pleasure craft to his product line. Joe Dyer designed and built Columbia River One Design (CROD) boats and boats for the United States Navy. The shipyard was on the east bank of the Lewis and Clark River and the Jeffers Slough. Due to its historical importance the site is on the National Register of Historic Places in Clatsop County, Oregon. Astoria Marine Construction shipyard closed in 2013.

Coast Guard Air Station Astoria was established on August 14, 1964, at Astoria Regional Airport in Warrenton, Oregon, United States. The unit houses 67 active duty, 24 reserve duty and one civilian personnel. The unit operates three Sikorsky MH-60 Jayhawk helicopters. According to a 2003 press release, the unit's annual budget is $1,107,051. The unit's functions include search and rescue, law enforcement, aids to navigational support, and environmental protection. Air Station Astoria served as one of the filming locations for the movie The Guardian (2006).On April 28, 2017, the Coast Guard announced it would base two Sentinel-class cutters in Astoria, in 2021.

Astoria Regional Airport (IATA: AST, ICAO: KAST, FAA LID: AST) is a joint civil-military public airport in Warrenton, three miles southwest of Astoria, in Clatsop County, Oregon. The airport is owned by the Port of Astoria and is the home of Coast Guard Air Station Astoria. The airport has no airline flights. Flights to Portland International Airport were most recently provided by SeaPort Airlines from March 2008 until Spring of 2010. Until 1974-75 Astoria had flights on West Coast Airlines and its successors. Federal Aviation Administration records say the airport had 1,851 passenger boardings (enplanements) in calendar year 2008, 1,531 in 2009 and 3,482 in 2010. The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a general aviation facility based on enplanements in 2008 (the commercial service category requires 2,500 per year) but it would be categorized as commercial service - non-primary based in enplanements in 2010.

Jeffers Garden is an unincorporated community in Clatsop County, Oregon, United States. Its population, recorded as the Jeffers Gardens census-designated place, was 368 as of the 2010 census.Astoria Marine Construction Company a site on the National Register of Historic Places in Clatsop County, Oregon is in Jeffers Garden on the Lewis and Clark River and the Jeffers Slough. Due to its historical importance the site is on the National Register of Historic Places in Clatsop County, Oregon.

The Lewis and Clark River Bridge is a bascule bridge that spans the Lewis and Clark River on U.S. Route 101 Business (a section originally part of U.S. Route 101) in Clatsop County, Oregon. It was designed by Conde McCullough and opened in 1925. It was built to replace an earlier bridge at the same location, a swing-span bridge constructed around 1910. The total length of the bridge is 828 feet (252 m), and the length of the bascule main span is 112 ft (34 m). The approach spans consist of a total of 48 timber pile and stringer spans.

South Jetty High School was a public high school in Warrenton, Oregon, United States. It was located at the North Coast Youth Correctional Facility, which closed down in 2017.

The Lewis and Clark River is a tributary of Youngs River, approximately 20 miles (32 km) long, in northwest Oregon in the United States. It drains 62 square miles (160 km2) of the Northern Oregon Coast Range in the extreme northwest corner of the state, entering Youngs River just above its mouth on the Columbia River at Youngs Bay. Near the river's mouth is the site of former Fort Clatsop of the Lewis and Clark Expedition. The river is named for Meriwether Lewis and William Clark.

Miles Crossing is an unincorporated community in Clatsop County, Oregon, United States.

Youngs Bay, or Youngs River Bay, is located in the northwestern corner of the U.S. state of Oregon. The Youngs River meets the Columbia River at this point, which is situated between Astoria and Warrenton. The bay is named for the Youngs River, which was discovered in 1792 by William Robert Broughton of the Vancouver Expedition. The river was named for Admiral Sir George Young of the Royal Navy. There are two road bridges that cross the bay, with the busiest being the new Youngs Bay Bridge, a vertical-lift bridge completed in 1964, that spans approximately 1.75 miles (2.82 km) and is a two-lane part of U.S. Route 101 running north to south. There is also the Old Youngs Bay Bridge about two miles to the east, completed in 1921. From 1895 to 1986, a 1.6-mile (2.6 km) railroad trestle also crossed the bay. Built in 1896 for the Astoria and Columbia River Railway Company, it was later transferred to the Spokane, Portland and Seattle Railway, and finally to Burlington Northern Railroad. It included a swing-type draw span. The New Youngs Bay Bridge passed over the top of the SP&S bridge near the north river bank. The railroad bridge was used for the last time in 1982 and was dismantled in 1986.The bay is fished extensively for sturgeon and salmon when in season. Most of the gillnetting community moors and fishes in Youngs Bay. The bay can be seen rising and falling significantly with the tides created where the bay meets the Columbia River, which meets the Pacific Ocean approximately 10 miles (16 km) to the west.

The New Youngs Bay Bridge is a vertical-lift bridge over Youngs Bay on U.S. Route 101 (US 101) between Astoria and Warrenton. Including the approaches, it is 4,200 feet (1,300 m) long and was completed in 1964. The road bridge had been proposed since 1948 and was approved by the state government in the late 1950s. The routing across Youngs Bay for US 101 was chosen in 1955 over a more inland alignment that would have avoided the bay entirely. Construction began in March 1963 and was dedicated on August 29, 1964.The bridge was built to the west of, closely in parallel to, a 1.6-mile (2.6 km) railroad trestle which also crossed the bay. It was built in 1896 for the Astoria and Columbia River Railway Company. The New Youngs Bay Bridge passed over the top of the railway bridge near the north river bank. The railroad bridge was used for the last time in 1982 and was dismantled in 1986.

The Youngs River is a tributary of the Columbia River, approximately 27 miles (43 km) long, in northwest Oregon in the United States. It drains part of the Northern Oregon Coast Range in the extreme northwest corner of state, entering the Columbia via Youngs Bay just approximately 10 miles (16 km) from its mouth. It rises in a remote section of the mountains of central Clatsop County, north of Saddle Mountain State Natural Area. It flows generally northwest, passing over Youngs River Falls. The falls were encountered in 1806 by a hunting party of the Lewis and Clark Expedition from nearby Fort Clatsop and documented in William Clark's journals. It broadens in a large estuary and enters the south end of Youngs Bay on the Columbia at Astoria. It receives the Klaskanine River from the east approximately 5 miles (8 km) south of Astoria. It receives the Wallooskee River from the east approximately 2 miles (3 km) south of Astoria. Named tributaries of Youngs River from source to mouth are Fall Creek and South Fork Youngs River, then Fox, Osgood, Rock, Bayney, Wawa, and Moosmoos creeks followed by the Klaskanine River. Below that come Cooperage, Battle Creek, Tucker, Casey, Binder, and Cook sloughs followed by the Wallooskee River. Further downstream are Crosel, Brown, and Craig creeks followed by Knowland Slough and the Lewis and Clark River.About 13 miles (21 km) from the mouth of the river are Youngs River Falls, a 54-foot (16 m) tall waterfall.