; and (B) this Act. (b) Effect Nothing in this section affects the ownership, management, or other rights relating to any non-Federal land (including any interest in any non-Federal land). 205. Trails study (a) In general Not later than 2 years after the date of enactment of this Act, the Secretary of Agriculture, in accordance with subsection (b) and in consultation with interested parties, shall conduct a study to improve motorized and nonmotorized recreation trail opportunities (including mountain bicycling) on land not designated as wilderness within the portions of the Six Rivers, Shasta-Trinity, and Mendocino National Forests located in Del Norte, Humboldt, Trinity, and Mendocino counties. (b) Consultation In carrying out the study required by subsection (a), the Secretary of Agriculture shall consult with the Secretary of the Interior regarding opportunities to improve, through increased coordination, recreation trail opportunities on land under the jurisdiction of the Secretary of the Interior that shares a boundary with the national forest land described in subsection (a). 206. Construction of mountain bicycling routes (a) Trail construction (1) Feasibility study Not later than 18 months after the date of enactment of this Act, the Secretary of Agriculture shall study the feasibility and public interest of constructing recreational trails for mountain bicycling and other nonmotorized uses on the routes as generally depicted in the report titled Trail Study for Smith River National Recreation Area Six Rivers National Forest and dated 2016. (2) Construction (A) Construction authorized Subject to appropriations, and in accordance with paragraph (3), if the Secretary determines under paragraph (1) that the construction of one or more routes described in such paragraph is feasible and in the public interest, the Secretary may provide for the construction of the routes. (B) Modifications The Secretary may modify the routes as necessary in the opinion of the Secretary. (C) Use of volunteer services and