Because it is the same association. Rivers Mist and River Run at the Brazos are two neighborhoods governed by one owners association, filed with the state as River''s Run at the Brazos Owners Association, Inc.

This is not an error on your closing documents and it does not mean you bought into the wrong neighborhood. When the Texas management-certificate register is searched for Fort Bend County, there is exactly one filing for this body — and no association filed under any form of "Rivers Mist" anywhere in the county. The four filings statewide using that name are all in Bexar and Brazoria counties, and none of them is yours.

What follows from it: one board, one set of governing documents, one management company — Genesis Community Management — and one assessment structure covering both neighborhoods. The amenities are shared too, which is why your access card works at a pool that is not on your street.

So when you look for your association online, search the River''s Run name rather than Rivers Mist. Searching your own neighborhood''s name will return nothing, which is how most residents end up convinced their HOA has disappeared.

Yes. The pool and fitness facility at 1102 Butterfly Lane serves the whole association, which covers Rivers Mist as well as River Run at the Brazos. It is not River Run''s private amenity, even though the address sits over there.

Fitness hours are published as 6am to 9pm, and an access card is required — the door will not open without one. Cards, access forms, pool rules and the seasonal schedule come from the association rather than from the utility district.

If you have just moved in, sort the access card before the first hot weekend rather than on it.

The full association guide, including assessments and architectural approval, is in our HOA guide.

Two small museums in Rosenberg, both a short drive away, and neither is what people expect from a town this size.

The Black Cowboy Museum, 1104 3rd Street, Rosenberg, (281) 787-3308. Founded by Larry Callies to document the Black cowboys written out of most tellings of the American West — Bass Reeves, Nat Love, Bill Pickett among them. It is a small, personal museum and it is the kind of place visitors remember long after a larger attraction.

The Rosenberg Railroad Museum, 1921 Avenue F, (281) 633-2846. Opened in 2002 in a reproduction Santa Fe depot. It holds Tower 17, a switching and signal tower taken apart and rebuilt here; the 1879 private rail car "Quebec"; a Missouri Pacific caboose; model trains with reproductions of local buildings; and an interactive display showing real train movements, signals and switch alignments in real time. Mainline trains still pass the building while you are in it, which is the part children remember.

Neither museum publishes its opening days or admission prices in a form we could verify, so ring both before you drive over. We would rather say that than print hours that turn out to be wrong when you are standing at a locked door.