Budget 2–3 hours for the classic ruins-and-museum visit, or closer to 4 hours if you also want the training grounds and the Olympic Games History Museum. If you have only 90 minutes, keep your focus tight and accept that this will be a highlights visit rather than a full read of the site.
Start outdoors if you arrive near opening. The ruins are coolest and quietest before 10am, and the museum makes a smart second stop once the heat rises and tour groups begin clustering. Move through the Altis first, continue through the Krypte to the stadium, then double back to the palaestra and gymnasium before exiting for the museum. Once you leave the fenced archaeological area, the natural flow of the visit is over.
