<p>Does Caltech allow prospective students to stay overnight in a dorm on campus? (I checked the website and couldn't get an answer.)</p>
<p>Yes. If you call the main admissions office this can be arranged. (For admitted students.) We also have a weekend during which all admitted students are invited to stay overnight and get a feel for campus life.</p>
<p>Wait, not necessarily. We did last year, but I was told they were going to be a lot stricter about overnights this year, possibly not doing them at all, or just offering them for people who legitimately couldn't make prefrosh weekend (which is in April). Either way, the answer is still what Ben said -- call the admissions office.</p>
<p>If you know anyone there, you can be like me, who just showed up and crashed with friends (and new friends) under no official oversight. I was impressed by how they were nevertheless dedicated to pre-frosh rules (haha, "They're all fine houses"). And Ben, I think I saw you but didn't say anything... if you saw a completely random person sitting behind you in the Introduction to Geometry and Topology class, that was me.</p>