Pinpointing the exact pages for Don Quixote's adventures is tricky because editions vary wildly—the book is so long publishers often split it into volumes, use different fonts, and include varying introductions. I've got a worn-out paperback that clocks in around 940 pages, but the famous windmill tilt happens relatively early, maybe around page 60 or 70 in that edition. The episode with the fulling mills is a bit later, maybe page 150, and the encounter with the lions is well into the second part.
Instead of hunting for page numbers, I find it more helpful to think in terms of chapters and parts. The really iconic adventures—attacking the windmills, the fight with the Basque, the helmet of Mambrino—are all in the early chapters of Part One. The more elaborate, meta-fictional escapades, like the journey to the Cave of Montesinos or the governance of Sancho on his 'island,' are deep in Part Two. If your copy has chapter headings, that's your best navigation tool.
My advice? Grab your copy and skim the chapter summaries if it has them, or just dive into the early chapters for the classic bits. The exact page where he charges those windmills will shift, but the absurd, heartfelt spirit of the adventure is on every page from start to finish.