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  1. #1
    Yappy little dog!
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    Centennial Cone Completely Open

    Seasonal Closure lifted for Elk Range Trail at Centennial Cone Park. Remember weekend days alternate: hiking odd and mtn biking even

  2. #2
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    Quote Originally Posted by schnauzers View Post
    Seasonal Closure lifted for Elk Range Trail at Centennial Cone Park. Remember weekend days alternate: hiking odd and mtn biking even
    Any chance we can institute a Boulder County residence parking and use fee?
    "Professional" XC Heroes excise tax?
    Naysayers never apologize. Critics go to their grave thinking everyone else is wrong.
    ╭∩╮( . )╭∩╮

  3. #3
    Agent of tang
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    Phew, now all the people clogging up Marshall Mesa have somewhere else to ride!

  4. #4
    Yappy little dog!
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    Quote Originally Posted by Pau11y View Post
    Any chance we can institute a Boulder County residence parking and use fee?
    "Professional" XC Heroes excise tax?
    I'm just a messenger. I gave up trying to change the minds of land owners a year ago.

    I'm sure that when I am doing the patrol thing at MM, the number one question will be why are they charging me five bucks to park, just like on NTM where the number one question is why dd they close off all the good trails?

    All I can tell you is stay on the trail, be polite, and hope we don't lose anymore land.

    Now go ride.

  5. #5
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    Quote Originally Posted by schnauzers View Post
    ...Now go ride.
    3pm can't get here quick enough!
    Naysayers never apologize. Critics go to their grave thinking everyone else is wrong.
    ╭∩╮( . )╭∩╮

  6. #6
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    Quote Originally Posted by schnauzers View Post
    Seasonal Closure lifted for Elk Range Trail at Centennial Cone Park. Remember weekend days alternate: hiking odd and mtn biking even
    Thanks! If your out there Saturday morning early say Hi! to the fat guy on a cayenne Yeti doing the loli-loop from Mayhem.

  7. #7
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    The route from the Mayhem parking lot to the cone and back via Travois was a lot harder then I thought it would be. Its worth considering for a good workout.
    Attached Thumbnails Attached Thumbnails Centennial Cone Completely Open-screen-shot-2011-06-15-10.09.45-pm.jpg  


  8. #8
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    Quote Originally Posted by 2wheelsnotfour View Post
    The route from the Mayhem parking lot to the cone and back via Travois was a lot harder then I thought it would be. Its worth considering for a good workout.
    I guess the data is in the details, but 5000' . I don't remember it being that much. Maybe 1300' - 1500'.

  9. #9
    zrm
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    Quote Originally Posted by schnauzers View Post
    I guess the data is in the details, but 5000' . I don't remember it being that much. Maybe 1300' - 1500'.
    GPS units are notoriously inaccurate at calculating vertical gain/loss

  10. #10
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    Quote Originally Posted by zrm View Post
    GPS units are notoriously inaccurate at calculating vertical gain/loss
    I might be hijacking yet another thread...sorry. I've heard this about GPS units (altimeter bit). I just ordered a bike computer (VDO MC1.0 Wireless Altimeter/Cycle Computer) that uses a barametric altimeter. Reviews I've read says it's pretty accurate. Wonder what the comparison is like with respect to accuracy between GPS and barametric altimeters (aside from $$$)?

  11. #11
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    The altitude gain/loss was more then I expected as well. Perhaps someone else can verify the figures. I imported the gpx file to Google Earth so the figures might be Google Earth's and not my GPS'.

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    Quote Originally Posted by zrm View Post
    GPS units are notoriously inaccurate at calculating vertical gain/loss
    From what I've read in the past, I tend to believe this as well. I don't really trust the altimeter built into my Delorme. I do have more faith in the topo maps that I import my tracks into and prefer to use this data. I've recorded a couple rides at Centennial Cone and, according to the mapping software, came up with about 5600' of total elevation gain for an out and back ride. All those little ups and downs can really add up. For what it's worth, I came up with about 21 or 22 miles round trip for an out and back from Mayhem Gulch. I get about 17 miles for the loop.

  13. #13
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    Quote Originally Posted by 2wheelsnotfour View Post
    The altitude gain/loss was more then I expected as well. Perhaps someone else can verify the figures. I imported the gpx file to Google Earth so the figures might be Google Earth's and not my GPS'.
    Nope they are your GPS data points. Google Earth can drape the GPS track on top of the terrain and ignore the GPS vertical data points though. That's why it still displays on top even though some altitudes are below the surface.

    Vertical data will always be off with a GPS due to signal reflection from the tree canopy. A barometric altimeter obviously doesn't have that issue.

    If altitude is a problem, I would look into to post processing your GPS data using software to correct the altitude.
    Will software correct GPS elevation inaccuracies?

    My GPS track from CNT is below.
    eTrex Legend GPS. And I use this for raw data import/edit/export.
    http://www.trackmaker.com/pages.php?article=51&lang=eng
    Last edited by UncleTrail; 02-13-2012 at 03:07 PM.

  14. #14
    Almost Human
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    Quote Originally Posted by 2wheelsnotfour View Post
    The altitude gain/loss was more then I expected as well. Perhaps someone else can verify the figures. I imported the gpx file to Google Earth so the figures might be Google Earth's and not my GPS'.
    I think you should divide by 2.

    up + down = elev. gain/lost

    FWIW CNT does not have 5000ft of climbing.

  15. #15
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    GPS altimeters are always off. For example, yesterday when I started my ride my Garmin 705 said my house was at 214' above sea level which I know for a rock solid fact is way wrong. You also see things like an out-and-back ride having more elevation gain than loss (or vice versa). So clearly they're unreliable on their own.

    However, if you upload your activity to Garmin Connect, there's a way to correct it. There's an option towards the bottom of the activities details page that says "Elevation Corrections". If you enable this feature, the ride track calculates elevation gain/loss by comparing your gpx file to USGS maps and spits out a much more accurate number.

  16. #16
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    I have one of these on my bike. It's heavy, but accurate as hell.


  17. #17
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    More like 2500' Just rode it this afternoon with the wife

    http://connect.garmin.com/activity/92877911

  18. #18
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    I have noticed the elevation actually fluctuating while I was standing still but darn, I was enjoying feeling super human.

  19. #19
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    Quote Originally Posted by 2wheelsnotfour View Post
    I have noticed the elevation actually fluctuating while I was standing still but darn, I was feeling super human.
    You should try increasing the data capture(logging) interval.

  20. #20
    Now with 20% more fat!!
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    Quote Originally Posted by KarateChicken View Post
    I have one of these on my bike. It's heavy, but accurate as hell.


    Me too!! R2 says there are only around 1600-1800 feet of climbing on a loop at the Cone.
    IMG_8033

  21. #21
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    Oh that blacksheep is beautiful!
    I'm a cowboy on a steel horse i ride!

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  22. #22
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    I like cones...


  23. #23
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    I think barometric calculations for elevation are more accurate than the GPS signal - unless there's some front blowing in.
    "Don't take life so serious, son . . . it ain't no how permanent." - Porky Pine

  24. #24
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    Quote Originally Posted by eggdog View Post
    More like 2500' Just rode it this afternoon with the wife
    So for a loop, we have data supporting 2500', 1700', and 4000' of total elevation gain/loss. There shouldn't be THAT much discrepancy. Does the Garmin info (2500') come from an internal altimeter or was this calculated after importing into a topo map?
    Attached Thumbnails Attached Thumbnails Centennial Cone Completely Open-centennial-cone-080310.jpg  


  25. #25
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    Cool/Cool. Can't wait to get out to the cone again. I'm not sure how you logged so my miles and elevation? When I do the loop I clock this:

    http://connect.garmin.com/activity/56148281

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