With marijuana legal in some form or another in almost half of the United States, a few Am Law 200 firms have ventured into the largely uncharted waters of marijuana law. Some firms active in the new practice area are based in states that permit medical or recreational pot use, especially Colorado and California. Other firms are building on their experience with familiar regulated industries like alcohol and gambling.

“I definitely see a lot more bigger firms now coming in and feeling out the space in the last year or two,” says Rachel Gillette, a Boulder-based solo practitioner who specializes in marijuana law.