INTRODUCTION 



Fxclosures, natural areas, and other t\'pes of areas that have received either 

 little or no use by domestic livestock have long been used as reference areas by range 

 managers and scientists. The importance of exclosures in range management was dis- 

 cussed by Williams (1962) and a simimary of tlie importance of natural areas in the 

 evaluation of the grazing resources of North America was presented by Anderson (1966). 



The need for a listing of exclosures and natural areas in any specific area has 

 been recognized. For the land manager, knowledge of an existing exclosure may make 

 erection of additional exclosures unnecessary. For the research worker, such a list 

 may provide locations of areas relatively undisturbed by domestic livestock for 

 ecological studies. 



A list of all livestock and big game exclosures in Wyoming was published by 

 Williams (1963). Young (1958) prepared a list of 36 big game exclosures in Utah but 

 the list was not intended to be a complete inventory, did not include livestock 

 exclosures or natural areas, and has not been updated. 



Because of the need for knowledge about exclosures and natural areas, the American 

 Society of Range Management initiated a "Reference Area" program. Included among this 

 program's objectives is the compilation of a comprehensive list of existing exclosures 

 and natural areas on rangelands in North America. Anderson (1966) described the goals 

 of this program. v 



The list presented here is part of the "Reference Area" program and it includes 

 all known fenced areas in Utah protected from grazing by either livestock or big game 

 as well as larger "natural areas" that are thought to have received little or no use 

 by domestic livestock because of natural barriers or inaccessibility. In addition, 

 some watershed basins along the Wasatch front from which grazing has been excluded for 

 many years are also included. 



The exclosures and natural areas are grouped under the agency which administers ' 

 or controls the land on which they occur and are further subdivided under districts in 

 the case of the National Forests and Bureau of Land Management. IVhere an agency other 

 than the land managing agency was involved in the construction, maintenance, or record- 

 keeping, the cooperating agency is indicated in parentheses by the following abbrevia- 

 tions after the name of the exclosure: 



ARS : Agricultural Research Service 



IF^RES: Intermountain Forest and Range Experiment Station 



(USDA Forest Service) 

 SCS : Soil Conservation Service 

 UF§G: Utah Division of Fish and Game 

 UofU: University of Utah 

 USU: Utah State University 



Information about the same exclosure reported by more than two agencies (usually 

 the Utah Division of Fish and Game and another agency) was merged as accurately as 

 possible, although conflicting information was sometimes encountered. If a conflict in 

 name occurred, both names are given. Conflicts about size, date of establishment, 

 location, etc., were resolved by contacting the agencies involved or by using the 

 information thought to be most accurate. However, some errors undoubtedly exist in the 

 list and corrections will be welcomed. 



