From the Super Mario Wiki
Brash's Cabin is the home of Brash in Donkey Kong Country 3: Dixie Kong's Double Trouble! It is located in Kremwood Forest. Brash's Cabin only appears in the Super Nintendo version of the game. In the Game Boy Advance version, it is replaced with Brash's Stadium, although it still serves the same purpose.
When Dixie Kong and Kiddy Kong first arrive at Brash's Cabin, Brash will boast about his record of 1:15 in Riverside Race. Should the Kongs beat this time, even if they do so before speaking to Brash, the Bear will throw a powerful temper tantrum, causing a nearby log to fall into the river. The log will get stuck downstream, but the Kongs can use it as a bridge to reach Arich's Hoard.