2nd Milestone (previously Snugbrough or Manx: Cronk Dhoo)  is road-side marker on the Snaefell Mountain Course used for the Isle of Man TT Races situated between Braddan Bridge and Union Mills on the primary A1 Douglas to Peel road in the parish of Braddan in the Isle of Man.
The 1905 International Motor-Cycle Cup Races held in the Isle of Man the 2nd Milestone was adjacent to the Quarterbridge which was used as the start and finish line. The 2nd Milestone is part of the Mountain Course used since 1911 for the Isle of Man TT and from 1923 for the Manx Grand Prix Races.
The section of road on the A1 Douglas to Peel road between Braddan Bridge and Union Mills incorporating the 2nd Milestone and Snugbrough was subjected to a road widening scheme in 1976 by the Isle of Man Highway Board.
- Place Names of the Isle of Man by John Kneen MA pp115 (1970) Yn Cheshaght Ghailckagh The Scolar Press
- TT 100 The Official Authorised History of Isle of Man Tourist Tophy Racing page 21 by Mick Duckworth Editor Miles Coswell (2007)(1st Edition) Lily Publications Ltd ISBN 1-899602-67-4
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