Where you land changes a lot
You could have the same sentence as another person and be treated drastically different. You could have the same charge as someone in another facility and have a different experience. The difference is the facility.
One level is written up in full so far. The rest is below, and honestly marked.
What I can and cannot tell you
I did eighteen months at a low. That is the level I can write about from the inside, and it is the one with a full guide. While I have talked to plenty of people who were at mediums and penitentiaries, writing a guide to a USP from a low would be exactly the kind of secondhand confidence I openly argue against.
Having said, the low guide is complete. The rest of this page is rather structural stuff, which is knowable from policy and from the facility-specific guides. I'm honest where the lived detail is missing. If you did time at a highly-political medium or a penitentiary and want to fix that, let's chat.
You do not pick your level, and neither does anyone you pay
The Bureau scores you into a security level with points on a scale. It takes into account your offense severity, criminal history, your sentence length, detainers, and your age. A person you didn't know exists decides what facility your time would be best served at using, criteria that is closed-source.
This means your
What each one is
Four levels you can be scored into, lowest to highest. One of them has a guide.
Camps
No fence, dormitory housing, work details that leave the compound. The lowest-point cases: mostly white collar, short sentences, no violence, no detainers. Most people picturing "federal prison camp" are picturing this and are mostly right.
Mediums
Cell housing, most weirdos, and a materially different social structure. Mediums are what most people imagine when they hear "prison" and less of what they imagine when they hear "federal."
Penitentiaries
Walls or reinforced fences, close staff supervision, cell housing, and the most politics in the system that carry consequences that do not exist elsewhere.
Administrative facilities are not a level.
Doing time at a low
Thirteen parts, from eighteen months inside one. Read while you're in first if you have not; this is that guide narrowed to one level, not a replacement for it.
Look up the actual place
The level tells you the shape. The facility tells you the details, and those vary more than the level does.
Did time at a medium or a USP?
The gap on this page is real and I would rather fill it with somebody's actual experience than with my guesses. If you did time at a level I have not written up, tell me what the guide should say. Credit or anonymity, your call.
I answer in the order received, usually within a couple of days. I have a day job. If your situation genuinely needs more than an email, I take a limited number of consults, so say so and we'll work it out.
If this helped, it'll help someone else's family too.