Yup. The classic foundation for our understanding of hoplite formation is Thucydides, 5.66-74. He describes the whole battle of Mantinea (part of the Peloponnesian War) and, at 5.71 the hoplite formation employed. It's a bit long to post the whole thing, but you can find a text in translation here: http://classics.mit.edu/Thucydides/pelopwar.5.fifth.html

Herodotus's famous descriptions in the Histories of the battles of Plataea (9.1-89) and Marathon (6.94-140) and really and battle description of his oils have been hoplite battles.

Xenophon (a soldier himself) also describes hoplite battles in his Hellenica and Anabasis. There really are a lot of (fascinating, first-hand) battle descriptions there, so without knowing exactly what you're after it's difficult to point to specific sections.

Later historians - Polybius, Plutarch, Pausanias, Diodorus etc - also describe various hoplite battles, but they're not really from the Classical period exactly.