- Gruber's Grinder
Gruber's Grinder a
mountain bike trail inHolly, Michigan ,United States .Paul Gary Gruber was born and lived in Michigan. Once a hard core mountain bike rider and racer, he took second place with Tail Wind Production and the
MMBA Points Series. He was instrumental in developing a race venue that included bike races at the "Big M" and "Owasippi" trails. Gruber mapped off, designed, developed and built this mountain bike path at Holdridge Lake State Park, in Southeast Michigan. This very technical trail measures 15.6 miles long. It is a tight, twisty, single track.External links
* [http://www.michigandnr.com/parksandtrails/trailinfo.asp?id=278 Michigan Department of Natural Resources Holly-Holdridge Mountain Bike Trail]
* [http://www.spokejunkies.com/reviews/index.php?get_page=holdridge Holdridge Trail Information]
* [http://www.mmba.org/trails.php?trail=13 MMBA Trail Guide]
* [http://www.3disciplines.com/index.php?option=com_events&task=view_detail&Itemid=&agid=34&year=2006&month=10&day=21 3Diciplins - Grubers Grinder]
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