What color is a Maibock? Any color. When does it come out? Usually late April into early May. How long does it last? Not long. Head to the Bierquellenwanderweg to hike an amazing beer hiking trail and taste some of the finest dark lagers on the planet. Go very early in May and you'll find two lovely Maibocks too.
Beer Hiking Bavaria is a great guide that details 50 hikes in Bavaria which pass by or end at some of Bavaria's best breweries. The Bierquellenwanderweg is one of the top beer hiking circuits you'll find.