(defendant not entitled to construct snowmobile trails across private property without acquiring rights-of-way or exercising power of eminent domain; defendant did not hold reversionary interest in property upon railroad abandonment of rail line; railroad company at issue not chartered within 15 years of 1852 Act and had also used power of condemnation to obtain rights-of-way necessary to operate line; upon abandonment of line in 1980, federal law allowed plaintiff to acquire right-of-way one year and one day later; defendant did not buy right-of-way from railroad at that time; snowmobile trail can be built on line across private property, but defendant must pay for such right or condemn the property).