14a) Situated in the Seirra Nevada the largest alpine lake in North America and the second deepest in the US (5) ????e
28a) Half brother to Sir Walter Raleigh who claimed Newfoundland in 1583(7) ????E?T
55a) Series of fortifications in China,along which marathons have been hosted since 1999 (5-4) ??E?T ?A?T