户外运动：森林徒步挑战

An adventurous forest trail challenge poster in a vertical heroic layout, a hiker with a backpack and trekking poles crossing a wooden suspension bridge over a misty canyon, sunbeams breaking through giant redwood trees, a winding dirt trail leading into the fog, mossy rocks and ferns in the foreground, a compass rose and contour-line pattern faint in the background. Bold outdoor sans-serif headline in deep forest green reads 'TRAILBLAZER', with a stencil sub-line '50KM WILD RUN' and a small elevation-profile graph at the bottom. Palette of forest green, moss, slate gray, mist white and cedar brown. Printed on weatherproof matte paper with a subtle canvas texture. The poster is stapled on a wooden signpost at a trailhead, hiking boots and maps hanging nearby. Soft side light from the upper right, early-morning forest quality, gentle god rays, long soft shadows. Wide shot, slightly low angle, natural texture detail, 4k