Brenner Reservoir   Be the first to submit input for Brenner Reservoir. If you have info on Brenner Reservoir, Niobrara County, Wyoming please submit it here to improve this web site.          These outdoors activities are available near Brenner Reservoir.   Public Lands Near Brenner Reservoir: Agate Fossil Beds National Monument, Harrison - NE, 58 miles away Devils Tower National Monument, Devils Tower - WY, 68 miles away Jewel Cave National Monument, Custer - SD, 69 miles away   Hotels Near Brenner Reservoir: Americas Best Value Inn, Lusk, 31 miles away Best Western Pioneer, Lusk, 31 miles away Auto Inn Motel, Newcastle, 33 miles away Fountain Inn, Newcastle, 35 miles away