Bull trout reach sexual maturity at between four and seven years of age and are known to live as long as 12 years. They spawn in the fall after temperatures drop below 48 degrees Fahrenheit, in streams with abundant cold, unpolluted water, clean gravel and cobble substrate, and gentle stream slopes.

What months do trout spawn?

Rainbow trout, including steelhead forms, generally spawn in early to late spring (January to June in the Northern Hemisphere and September to November in the Southern Hemisphere) when water temperatures reach at least 42 to 44 °F (6 to 7 °C).

How do you catch a trout spawning bull?

Spin casting with jigs, minnow imitating crankbaits, spoons, and spinners are all productive methods of fishing for these trout. For fly fishing, Minnows and any larger streamer type flies that represent minnows. In salmon-bearing streams and rivers during spawning season single egg patterns also work well.