More info:br/ a href="https://www.sierranevadageotourism.org/content/sulphur-works-lassen-volcanic-national-park/sieAC68C57C088C57EDF" target="_blank"https://www.sierranevadageotourism.org/content/sulphur-works-lassen-volcanic-national-park/sieAC68C57C088C57EDF/a