activity boulder cloud colorado cumulus debris fun hike hiker hiking landscape mountain natural nature path rock rocky rugged sky track trail Trek usa view walk walker walking austere bare bleak canada cold glacier hard mountains peak retreat Rockies Rocky Mountains scraped scratched scree snow stern abundance abundant blue bluebells England english flowers footpath Great Britain green Hyacinthoides non-scripta many profusion spring Sussex trees wild woodland altitude conifers distance distant far forest height high lake Lake Louise range water bank chilly freezing frozen grass hedge hill route shadow South Downs sunlight verge white winter beautiful beauty Endymion non-scriptum tree cliff coastline Cornish cornwall curved danger exercise fence fencing ocean protect rocks safety sea tide waves wooden ancient artificial bare.bleak barren desert dry harsh historical Israel line Massada old roman sere siege slope tour group tourism tourists craggy jasper panorama people rough shale summit travel