contexts: Alpine lakes are classified as lakes or reservoirs at high altitudes , usually starting around 5,000 feet ( 1524 metres ) in elevation above sea level or above the tree line .
name: Alpine lake
answers.input_text: short
answers.span_text: lakes or reservoirs at high altitudes , usually starting around 5,000 feet ( 1524 metres ) in elevation above sea level or above the tree line
questions.input_text: what is the definition of an alpine lake