Saturday, April 18, 2015

Marathon Nationals Pre Ride

Although overkill for the Bartram Trail, your back will appreciate the full suspension on the Keg and at Mistletoe.

For you scholarly types of mountain bike racers, I have some beta on the Marathon Nationals course.  This past week I took a little trip to Georgia to roll my tires over the 58 mile course.  Aside from what will be on private land, I rode most of what was available.  The course is roughly broken up into three sections with fire roads and asphalt making up connectors to get from one trail system to another.  I am racing in the single speed division so I also wanted to figure out my gearing.

The Bartram Trail is the first trail system to be ridden.  At 18.5 miles, it is the longest of the three. Some of it will be ridden twice, but in the opposite direction. It is flat, fast, and flowy.  It holds up well in the wet, as I experienced first hand.  Most of what was flung up on the bike and eye was not mud but bits of pine straw.  I quickly noticed I was under geared on this trail.

The Keg Trail is 9 miles.  It is mostly flat with just a few grunty climbs of 30-100 yards.  However, it does require 100% focus, what with its tight twists and turns, multiple bridges, and creek crossings. If it is wet, which it was when I rode, you had better make sure to mount your stickiest tires.  What with its hundreds of roots, most of which are angled and off cambered, this trail will make you eat dirt for lunch, if you are not careful.

Must "play nice" with the roots.

I also encountered (10 + n) log crossings where  (n = 5 to 10).  For me, half were rideable and the other half I practiced my CX dismount and remount.  If you like old school trail, this one will not disappoint.  Those who run wide bars or bar ends might find this extra exciting.  My gearing here was a little more likeable.  The "right" gear will be the one where you can hammer the flats, but that still allows you to get on top of on the short, but steep climbs.

The trails in Mistletoe State Park which will be utilized are Cliatt Nature Loop and the Rock Dam Trail, 8 miles in length.  Cliatt is wide open, smooth, and easy.  The Rock Dam is a beautiful old school trail that will throw alot at you in just 6 miles.  I was glad to have reconned this, as the beauty that enveloped the trail was astounding.


Cliatt Nature Trail

There are 3 flat rock creek crossings that look so doable.  But ... the algae is everywhere.  My guess is that the coefficient of friction between these rocks and your tire is about 0.03, which is also the same as ICE!  You have been warned.


Collarbone breaker #1

Collarbone breaker #2

Collarbone breaker #3


The climbs on the Rock Dam trail are short, but steep, and always seem to occur after a ditch drop, a creek crossing, basically momentum busters.  Most of my sessioning involved deciding when to run like hell.

15% grade after a ditch crossing

There is one fun rocky section about 75 yards long on about 12% grade and 20% off camber.  This was one of a couple techy sections where I did some true sessioning.  As long as I did not look to my right, I was o.k.



video



After 3 good days of riding, I think I have finally figured out my gearing and tire choice.  This course may be flat, but it is not gonna be easy.  You are going to be on the gas ALL the time!  Glad I like to spin, spin, spin!





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