<p>We have a pond and a river, but no lake (on the main campus).</p>
<p>The pond is quite large though…</p>
<p>The event you are referring to is the Polar Bear Swim which is done during Winter Carnival.</p>
<p>[History</a> of the Polar Bear Swim](<a href=“http://parents.dartmouth.edu/news_and_events/news_articles/polar_bear_swim.html]History”>http://parents.dartmouth.edu/news_and_events/news_articles/polar_bear_swim.html)</p>
<p>Winter Carnival Pictures:
[TheDartmouth.com</a> | Images from Winter Carnival 2009](<a href=“http://thedartmouth.com/2009/02/17/photoessay/8/]TheDartmouth.com”>http://thedartmouth.com/2009/02/17/photoessay/8/)</p>