Avenue of the Chiefs - Access to Crazy Horse Monument South Dakota East of highway 1 mile. Note, side trip taken to Crazy Horse Monument, SD. THIS IS A MUST SEE, although it will take years to complete this masive project, this is a spectacular site to visit. The museum has excellant displays of original native costumes and are very well displayed. There is no government funding and it is said there will not be, as the site is managed by the tribes of the Black Hills and was originated by them. Nebraska / South Dakota State Line to the Black Hill National Forest Recration Area Black Hills National Forest stretches for 1.2 million acres, offering outdoor adventure like hiking, biking and camping amidst stunning scenery. Find grassy mountain meadows, towering granite peaks, deep canyons, cascading trout streams and clear, clean lakes.