High Sierra designs feature-rich, versatile adventure lifestyle gear for adventurers everywhere. Since their founding in 1978, they have committed themselves to creating durable, affordable product with distinctive details, delivering the freedom to go anywhere—near or far, on roads or trails, on mountain ridges or snowy slopes, no matter what form your adventure takes. High Sierra. Adventure The Day. Be sure to get extra savings on your next purchase by taking advantage of High Sierra coupon codes and special promotions.