The Fort Clatsop National Memorial commemorates the Lewis and Clark Corps of Discovery's expedition at the site where the group camped for the winter in 1805 and 1806. Located 5 miles from Astoria, the memorial includes a replica of Fort Clatsop as well as an interpretive center with gift shop and exhibit hall, rangers in period costume and several nature trails.Must see and do at Fort Clatsop National MemorialA highlight of the Fort Clatsop National Memorial is the Fort to Sea Trail, which begins at the Visitor Center and extends 5 miles through a forest, through a pasture featuring several small lakes through a tunnel and to the beach along the Pacific Ocean. Some people choose to walk the 10-mile round trip, while others arrange for a car to await them at the beach. There are also shorter versions of the trail, such as a 4-mile round-trip from the Visitor Center to Clatsop Ridge, or a half-mile loop near the Visitor Center.Best and worst time to go to Fort Clatsop National MemorialAlthough Fort Clatsop is open year-round, it only offers rangers in period costume leading programs during the summer months. Those who prefer fewer crowds often visit during the fall, winter or spring, while those who want to experience the site along with programs choose to go in the summer.Admission to Fort Clatsop National MemorialThose 16 and older pay $3 to visit Fort Clatsop National Memorial, while those 15 and younger may visit at no charge. Annual passes are available for $10 each per person.Wildlife at Fort Clatsop National MemorialLocal wildlife often seen at the memorial include deer, Roosevelt elk and 41 other species of mammal, from raccoons to rabbits. The park is also home to a variety of reptiles, amphibians and even fish, thanks to its streams.Insider tip for Fort Clatsop National MemorialThe park is relatively large, which means those with small children are advised to bring strollers during their visits. There are no restaurants or snacks available onsite, so anyone planning to spend a large part of the day there should bring their own.Author's bio: LeeAnn Neal is a journalist, blogger and Pacific Northwest native.