The list of 'Naruto' seasons is a bit of a winding ninja path itself, as it's often tied to the home video releases and streaming splits rather than the original Japanese broadcast arcs. The first part, simply titled 'Naruto', covers up to episode 135, which concludes the Sasuke Retrieval Arc. After that, the series entered a long stretch of filler episodes (136–220) that aren't in the original manga, which many releases bundle as separate seasons or just label as 'Naruto: Filler Episodes'. The core story picks back up with 'Naruto Shippuden', which adapts the timeskip. 'Shippuden' is then divided into numerous named arcs for its DVD and streaming releases. For instance, the first chunk is often called the 'Kazekage Rescue Arc' (episodes 1–32). Later prominent season titles include the 'Pain's Assault Arc', the 'Fourth Great Ninja War Arc' (which is massive and sometimes split further into parts like 'Confining the Jinchuriki' and 'The Gokage's Summit'), and finally, the 'Childhood Arc' that leads into the finale. It's less of a single definitive list and more about how your preferred platform has chosen to group the 700 total episodes. Some services use very broad, generic numbers like 'Season 1, 2, 3...', while others, like the old DVD releases, have specific arc-based names. The naming always points back to the major story milestones from the manga, even when the anime padded things out with its own adventures.
I always find myself just looking up an arc guide rather than a season list, to be honest. It's more useful for tracking the canon material. If you're diving in, paying attention to those arc boundaries—where the manga content is versus the anime-original filler—makes for a much smoother viewing experience. The emotional payoff of the final battles in 'Shippuden' hits differently when you haven't been sidetracked by dozens of extra missions.