Abstract: A retaining wall for remote environments such as wilderness trails utilizes an "H-beam" post member having first and second elongate, vertical plates joined in a spaced, generally parallel relationship by first and second vertical brace portions, so that the cross-section of the resultant construction yields a central cavity between a pair of open web or channel portions. For installation, a stake member (e.g., a segment of rebar or similar material) is driven into the ground, and the central cavity of the H-beam post is placed over the rebar, so that the rebar engages the central cavity and supports the H-beam post. Additional H-beam posts are installed at spaced intervals along the line of the intended retaining wall. Boards, planks or other elongate, sectional materials are inserted into the open webs between adjacent H-beam posts, and are successively stacked to create a wall. Anchors are installed from the H-beam post into the soil or rock for stability. Finally, a cap can be placed on the boards.