Alas, this begs the question: Why are the names of some geographic locations preceded by “the” and others not?
Rivers - THE Bronx River, THE Rio Grande, THE Nile; but not creeks, streams, springs, etc. - Sandy Creek, Comanche Springs.
Large bodies of salt water - THE Pacific Ocean, THE Gulf of Mexico; but Hudson Bay, Pirate’s Cove.
Large and small bodies of fresh water (no THE) - Lake Superior, Inks Lake, Walden Pond.
Mountain Ranges - THE Rocky Mountains, THE Alps; but not mountains - Pike’s Peak, Mt. Everest.
Towns, counties, states, countries, continents - Austin, Travis County, Texas, The United States of America (OK, this is an exception), North America.
It looks like the general rule is that the larger areas get prefixed with “the” while the smaller ones don’t. What I find especially strange about all of this is that even though there appears to be some kind of lexical rule about this, it is never taught ( as far as I can tell) yet no one ever seems to violate it. No one ever says, “I went swimming in Pacific Ocean” or “I went fishing in THE Deer Creek.”