much of wallace's writing for periodicals has been on conservation issues. he has also written official national park handbooks for redwood, yellowstone, mammoth cave, and new river gorge national parks. from 1998 until 2009, he served as a writer-consultant on a documentary film about the klamath/siskiyous by stephen fisher productions of los angeles. he has given talks, readings, and classes for local conservation organizations such as the siskiyou field institute and siskiyou land trust. he has taught nature writing at several universities.