What is that wooden path into the beach called?

Some might call it just a wooden path or boardwalk, but I was wondering if this structure had a specific name.

Solution 1:

As you have said yourself: boardwalk.

boardwalk ˈbɔːdwɔːk/.
noun: boardwalk;
plural noun: boardwalks.
a wooden walkway across sand or marshy ground.
NORTH AMERICAN a promenade along a beach or waterfront, typically made of wood.

(Google)

If you are happy to accept an American use then that is specifically a boardwalk.

Dictionary.com put the meaning relating to the shore first, without any sort of regional caveat:

noun
1.
a promenade made of wooden boards, usually along a beach or shore.