In November 1963 the first herd of bison, comprised of 28 head from Theodore Roosevelt National Memorial Park in North Dakota and Fort Niobrara National Wildlife Refuge in Nebraska, were released in Sage Creek Basin. In October of the following year, this herd was enlarged by an additional 25 head from Theodore Roosevelt. The herd has done well and by the end of 1967 numbered 122 individuals.[266] Since 1963 the buffalo have shown that they prefer the remoteness of Sage Creek Basin and have demonstrated little desire to leave that area.[267] In January 1964 in cooperation with the South Dakota Game, Fish and Parks Department, bighorn sheep were reintroduced. Twelve head of Rocky Mountain Bighorns from Colorado were released in a 370-acre holding pen with the view toward eventually restocking Badlands National Monument and other parts of South Dakota. This flock was supplemented by ten more animals the following month.[270] Unfortunately, losses were suffered by both adults and lambs during the first two and one-half years. The situation improved early in 1966 with no further losses until the summer of 1967 when the peak flock of 27 individuals suffered a severe setback. In September, when all but 13 had succumbed to a respiratory infection, the bighorn were released from the holding pasture. They now roam the rugged Badlands south of Pinnacles Overlook.[271] In February 1964, the NPS purchased Cedar Pass Lodge, together with 72 acres of the surrounding land, for $275,000 from the Millard family. The lodge is now being run on a contract basis by a concessioner.[272] Increased travel to the area during the years of Mission 66 fully justified the expanded development program of the national monument. From 1956 to 1966 the number of visitors increased 65 percent (see Appendix A). Because of this great increase in travel, the summer visitor may find some of the scenic-overlook parking areas full, the visitor center crowded, and the nightly campground amphitheater program with “standing room only.” Since increased visitor use is practically assured in the foreseeable future, plans are already being made to provide additional facilities for visitors to Badlands National Monument. APPENDIX A ANNUAL NUMBER OF VISITS TO BADLANDS NATIONAL MONUMENT SINCE ITS ESTABLISHMENT[273] Year Total Visits Percent increase or decrease over previous year