Born-Digital or AnalogAnalogTranscriptMary's River "Continuing thru Lodore Canon and successfully threading Hell's Half-mile Ashley came to Echo park and noted a beautiful river coming in from the east. This was our own Yampa, upon which Ashley bestowed the name Mary's River. However, that name was soon dropped and the trappers came to speak of this affluent of the green as Yampa or Bear River." Hafen-Post 12/20/25CollectionWestern History Subject IndexRelated MaterialWestern History Subject Index AbbreviationsType of MaterialIndex CardLanguageeng