Big Run

Big Run is a special event in Splatoon 3. They were first announced to occur in the Splatoon 3 Nintendo Direct. Big Runs are limited-time events in which Salmonids invade the stages used by Inklings and Octolings for Turf War and Anarchy Battles, allowing players to partake in Salmon Run Next Wave on those stages.

Description
In the initial announcement, footage of a Big Run shift at Wahoo World interrupted the previously shown Cohozuna footage with glitch-like effects. In what was shown, Boss and Lesser Salmonids attacked a player attempting to collect and place Golden Eggs in an Egg Basket atop the center platform of the course. All sections of the stage except the central platform and the standard spawn point areas of the map were flooded, and the sky was red. This event was said to occur every few months. The trailer also features a remix of Clickbait in the style of ω-3. It is unknown if Big Run is accessible through Grizzco during the event period or if its availability will restrict access to normal battle modes such as Turf War or Anarchy Battles and/or Salmon Run Next Wave shifts, similar to Splatfest Battles' mode access restriction.

At the end of the Chill Season 2022 announcement trailer another Big Run trailer interrupted the shown footage, showing off more of what Big Run taking place at that stage would be like, as well as Splatsville's cosmetic changes throughout the event. The trailer starts showing what seems to be a snippet of the Big Run Splatcast, and then shows Splatsville with a pink sky and helicopters overhead, while there are new posters stuck all around inside and outside Grizzco. During Wahoo World Big Run gameplay, the sky in-stage is now a dark pink, and Grizzco helicopters are flying overhead. The stage remains unchanged from the first trailer, though more of it is shown, with the three different tides, Known Occurrences and Xtrawaves being confirmed to be in Big Runs.

Trivia

 * During the initial Big Run reveal, the sky in the footage was a dark red, matching that of the sky when an Xtrawave is happening outside of a Big Run. This was most likely a placeholder, as the sky was changed to pink in the second trailer.
 * In the background of Wahoo World, the "seven rings" mentioned in Splatoon 2's Sunken Scroll 17 can be seen.
 * The Sunken Scroll's illustration also appears briefly in the Chill Season 2022 announcement trailer for a few frames at the beginning of the Big Run segment.