Methodology

We predict your future race times based on completed time of any one race and the median multiplier of users who have finished the race based on historical results. The resulting value is called Race Median Multiplier (RMM) and is calculated for every year.


The RMM is most accurate when we have more participants that completed the two races being analyzed. Currently, the 2021 Silver Rush 50 MTB and the 2021 Leadville Trail 100 MTB have the most participants finishing both races - 244. There are many races that have only one person that completed both races, so this prediction is not going to be very accurate at all. An example of this is the 2021 Silver Rush 50 and the 2021 Barn Burner (Bronco) - only one person finished both races, producing a weak RMM.


Example - we took the finish times of all participants who completed both the 2021 Silver Rush 50 MTB and the 2020 Leadville Trail 100 MTB race (there were 244 in total), and determined how much longer the 100 mile race took in comparison to the 50 mile race. When we analyzed this data set, we determined that the Race Median Multiplier (RMM) for these two races is 1.8. That is, it took 1.8 times longer to complete the 100 mile race than it did the 50 mile race.
Below are the RMMs for past races:

2023 Events Finishers of Both Races RMM Accurancy
2023 Leadville 100 MTB & 2023 Leadville Stage Race 108 0.9 very high
2023 Silver Rush 50 MTB & 2023 Leadville Stage Race 33 1.5 moderate
2023 Silver Rush 50 MTB & 2023 Leadville 100 MTB 227 1.7 extremely high
2022 Events Finishers of Both Races RMM Accurancy
2022 Austin Rattler MTB & 2022 Tahoe Trail MTB 3 1.0 low
2022 Austin Rattler MTB & 2022 Wilmington Whiteface MTB 2 1.0 low
2022 Austin Rattler MTB & 2022 Lutsen 99er 5 1.1 low
2022 Austin Rattler MTB & 2022 Leadville Trail 100 MTB Pro 1 1.6 low
2022 Austin Rattler MTB & 2022 Leadville Trail 100 MTB 31 1.8 moderate
2022 Austin Rattler MTB & Crusher in the Tushar 2022 5 1.2 low
2022 Austin Rattler MTB & 2022 Stages Cycling Leadville Stage Race 4 1.5 low
2022 Leadville Trail 100 MTB & 2022 Stages Cycling Leadville Stage Race 98 0.9 high
2022 Leadville Trail 100 MTB Pro & 2022 Stages Cycling Leadville Stage Race 5 0.9 low
2022 Tahoe Trail MTB & 2022 Lutsen 99er 3 1.1 low
2022 Tahoe Trail MTB & Crusher in the Tushar 2022 16 1.1 moderate
2022 Tahoe Trail MTB & 2022 Leadville Trail 100 MTB 102 1.6 very high
2022 Tahoe Trail MTB & 2022 Wilmington Whiteface MTB 2 1.0 low
2022 Tahoe Trail MTB & 2022 Stages Cycling Leadville Stage Race 12 1.5 moderate
2022 Tahoe Trail MTB & 2022 Leadville Trail 100 MTB Pro 9 1.7 low
Crusher in the Tushar 2022 & 2022 Leadville Trail 100 MTB 44 1.5 moderate
2022 Leadville Silver Rush MTB & 2022 Tahoe Trail MTB 3 1.0 low
Crusher in the Tushar 2022 & 2022 Lutsen 99er 3 1.1 low
2022 Leadville Silver Rush MTB & 2022 Lutsen 99er 6 1.2 low
2022 Leadville Silver Rush MTB & 2022 Stages Cycling Leadville Stage Race 31 1.6 moderate
2022 Leadville Silver Rush MTB & 2022 Austin Rattler MTB 9 1.0 low
2022 Leadville Silver Rush MTB & 2022 Wilmington Whiteface MTB 2 0.8 low
Crusher in the Tushar 2022 & 2022 Stages Cycling Leadville Stage Race 18 1.3 moderate
2022 Leadville Silver Rush MTB & 2022 Leadville Trail 100 MTB 188 1.8 extremely high
2022 Leadville Silver Rush MTB & 2022 Leadville Trail 100 MTB Pro 5 1.9 low
Crusher in the Tushar 2022 & 2022 Leadville Trail 100 MTB Pro 49 1.5 moderate
2022 Leadville Silver Rush Run & 2022 Leadville Trail 100 77 2.8 high
2022 Lutsen 99er & 2022 Leadville Trail 100 MTB 74 1.5 high
2022 Lutsen 99er & 2022 Stages Cycling Leadville Stage Race 16 1.3 moderate
2022 Lutsen 99er & 2022 Leadville Trail 100 MTB Pro 4 1.5 low
2022 Life Time Leadville Trail Marathon & 2022 Leadville Trail 100 76 4.7 high
2022 Life Time Leadville Trail Marathon & 2022 Leadville Silver Rush Run 95 1.8 high
2022 Wilmington Whiteface MTB & 2022 Lutsen 99er 9 1.1 low
2022 Wilmington Whiteface MTB & 2022 Leadville Trail 100 MTB 60 1.8 high
2022 Wilmington Whiteface MTB & Crusher in the Tushar 2022 1 1.2 low
2022 Wilmington Whiteface MTB & 2022 Stages Cycling Leadville Stage Race 5 1.6 low
2022 Wilmington Whiteface MTB & 2022 Leadville Trail 100 MTB Pro 3 1.7 low
2021 Events Finishers of Both Races RMM Accurancy
2021 Austin Rattler RUN & 2021 Silver Rush 50 Run 4 2.3 low
2021 Austin Rattler MTB & 2021 Stages Cycling Leadville Trail 100 MTB 28 1.8 moderate
2021 Austin Rattler MTB & Crusher in the Tushar 2021 1 1.1 low
2021 Austin Rattler MTB & 2021 Tahoe Trail MTB 2 1.0 low
2021 Austin Rattler MTB & 2021 Stages Cycling Leadville Stage Race 2 1.6 low
2021 Austin Rattler RUN & 2021 Leadville Trail 100 Run presented by La Sportiva 5 6.2 low
2021 Barn Burner (Bronco) & 2021 Silver Rush 50 MTB 1 1.6 low
2021 Barn Burner (Cowboy) & 2021 Stages Cycling Leadville Trail 100 MTB 1 2.1 low
2021 Barn Burner (Bronco) & 2021 Tahoe Trail MTB 2 1.4 low
2021 Barn Burner (Bronco) & 2021 Stages Cycling Leadville Stage Race 1 2.6 low
2021 Stages Cycling Leadville Trail 100 MTB & 2021 Stages Cycling Leadville Stage Race 71 0.9 high
2021 Tahoe Trail MTB & 2021 Stages Cycling Leadville Stage Race 5 1.5 low
2021 Tahoe Trail MTB & Crusher in the Tushar 2021 6 1.1 low
2021 Tahoe Trail MTB & 2021 Stages Cycling Leadville Trail 100 MTB 98 1.7 high
2021 Silver Rush 50 MTB & 2021 Austin Rattler MTB 10 1.1 low
2021 Silver Rush 50 MTB & Crusher in the Tushar 2021 1 1.4 low
2021 Silver Rush 50 MTB & 2021 Tahoe Trail MTB 4 1.0 low
2021 Silver Rush 50 Run & 2021 Leadville Trail 100 Run presented by La Sportiva 70 2.7 high
Crusher in the Tushar 2021 & 2021 Stages Cycling Leadville Trail 100 MTB 48 1.5 moderate
2021 Silver Rush 50 MTB & 2021 Stages Cycling Leadville Trail 100 MTB 198 1.8 extremely high
Crusher in the Tushar 2021 & 2021 Stages Cycling Leadville Stage Race 9 1.2 low
2021 Silver Rush 50 MTB & 2021 Stages Cycling Leadville Stage Race 21 1.5 moderate
2021 Leadville Trail Marathon & 2021 Austin Rattler RUN 5 0.9 low
2021 Leadville Trail Marathon & 2021 Leadville Trail 100 Run presented by La Sportiva 69 4.9 high
2021 Leadville Trail Marathon & 2021 Silver Rush 50 Run 105 1.8 very high
2019 Events Finishers of Both Races RMM Accurancy
2019 Barn Burner (Cowboy) & 2019 Leadville Trail 100 MTB 2 2.5 low
2019 Barn Burner (Cowboy) & 2019 Leadville Stage Race 1 1.9 low
2019 Barn Burner (Bronco) & 2019 Leadville Trail 100 MTB 1 3.1 low
2019 Barn Burner (Bronco) & 2019 Leadville Stage Race 3 2.6 low
2019 Leadville Trail 100 MTB & 2019 Leadville Stage Race 119 0.9 very high
2019 Silver Rush 50 MTB & 2019 Leadville Trail 100 MTB 250 1.8 extremely high
2019 Silver Rush 50 MTB & 2019 Leadville Stage Race 40 1.6 moderate
2019 Silver Rush 50 MTB & 2019 Barn Burner (Bronco) 2 0.6 low
2019 Leadville Silver Rush 50 Run & 2019 Leadville Trail 100 Run 97 2.7 high
2019 Lutsen 99er & 2019 Leadville Trail 100 MTB 1 1.9 low
2019 Leadville Trail Marathon & 2019 Leadville Trail 100 Run 109 5.9 very high
2019 Leadville Trail Marathon & 2019 Leadville Silver Rush 50 Run 170 2.2 extremely high
2018 Events Finishers of Both Races RMM Accurancy
2018 Century Link Barn Burner (Bronco) & 2018 Lutsen 99er 1 1.8 low
2018 Century Link Barn Burner (Bronco) & 2018 CenturyLink Leadville Trail 100 MTB 1 2.7 low
2018 Century Link Barn Burner (Bronco) & 2018 CenturyLink Leadville Stage Race 3 2.5 low
2018 CenturyLink Leadville Trail 100 MTB & 2018 CenturyLink Leadville Stage Race 122 0.9 very high
2018 CenturyLink Silver Rush 50 Run & 2018 CenturyLink Leadville Trail 100 Run 87 2.5 high
2018 Silver Rush 50 MTB & 2018 CenturyLink Leadville Trail 100 MTB 260 1.7 extremely high
2018 Silver Rush 50 MTB & 2018 Lutsen 99er 6 1.2 low
2018 Silver Rush 50 MTB & 2018 CenturyLink Leadville Stage Race 33 1.5 moderate
2018 Lutsen 99er & 2018 CenturyLink Leadville Trail 100 MTB 72 1.5 high
2018 Lutsen 99er & 2018 CenturyLink Leadville Stage Race 14 1.3 moderate
2018 CenturyLink Leadville Trail Marathon & 2018 CenturyLink Silver Rush 50 Run 126 1.9 very high
2018 CenturyLink Leadville Trail Marathon & 2018 CenturyLink Leadville Trail 100 Run 102 4.9 very high
2017 Events Finishers of Both Races RMM Accurancy
2017 Leadville Trail 100 MTB & 2017 Leadville Stage Race 99 0.9 high
2017 Silver Rush 50 Run & 2017 Leadville Trail 100 RUN 69 2.5 high
2017 Silver Rush 50 MTB & 2017 Lutsen 99er 9 1.3 low
2017 Silver Rush 50 MTB & 2017 Leadville Trail 100 MTB 234 1.7 extremely high
2017 Silver Rush 50 MTB & 2017 Leadville Stage Race 28 1.4 moderate
2017 Lutsen 99er & 2017 Leadville Stage Race 10 1.2 low
2017 Lutsen 99er & 2017 Leadville Trail 100 MTB 81 1.4 high
2017 Leadville Trail Marathon & 2017 Leadville Trail 100 RUN 73 4.9 high
2017 Leadville Trail Marathon & 2017 Silver Rush 50 Run 110 1.9 very high
2016 Events Finishers of Both Races RMM Accurancy
2016 Leadville Trail 100 MTB & 2016 Leadville MTB Stage Race 97 0.9 high
2016 Silver Rush 50 MTB & 2016 Leadville MTB Stage Race 32 1.5 moderate
2016 Silver Rush 50 MTB & 2016 Leadville Trail 100 MTB 251 1.7 extremely high
2016 Silver Rush 50 MTB & 2016 Lutsen 99er 7 1.2 low
2016 Silver Rush 50 MTB & 2016 Barn Burner (Bronco) 1 0.5 low
2016 Lutsen 99er & 2016 Leadville Trail 100 MTB 65 1.4 high
2016 Lutsen 99er & 2016 Leadville MTB Stage Race 9 1.3 low
2016 Leadville Trail Marathon & Leadville Trail 100 Run 2016 82 4.8 high
2015 Events Finishers of Both Races RMM Accurancy
2015 Silver Rush 50 MTB & 2015 Leadville Trail 100 MTB 250 1.8 extremely high
2015 Silver Rush 50 MTB & 2015 Lutsen 99er 3 1.2 low
2015 Lutsen 99er & 2015 Leadville Trail 100 MTB 58 1.4 high
Leadville Trail Marathon 2015 & Leadville Trail 100 Run 2015 78 4.9 high
2014 Events Finishers of Both Races RMM Accurancy
2014 Silver Rush 50 MTB & 2014 Leadville Trail 100 MTB 244 1.7 extremely high
2014 Silver Rush 50 MTB & 2014 Lutsen 99er 2 1.1 low
2014 Lutsen 99er & 2014 Leadville Trail 100 MTB 39 1.3 moderate
2014 Leadville Trail Marathon & Leadville Trail 100 Run 2014 71 4.8 high
2013 Events Finishers of Both Races RMM Accurancy
2013 Silver Rush 50 MTB & 2013 Leadville Trail 100 MTB 259 1.7 extremely high
Leadville Trail Marathon 2013 & Leadville Trail 100Mi Run 2013 77 4.8 high
2012 Events Finishers of Both Races RMM Accurancy
2012 Silver Rush 50 MTB & 2012 Leadville Trail 100 MTB - Singlespeed 2 1.9 low
2012 Silver Rush 50 MTB & 2012 Leadville Trail 100 MTB 228 1.8 extremely high
2011 Events Finishers of Both Races RMM Accurancy
2011 Silver Rush 50 MTB & 2011 Leadville Trail 100 MTB 115 1.8 very high
Leadville Trail Marathon 2011 & LRS Leadville Trail 100 Run 2011 47 4.7 moderate
2010 Events Finishers of Both Races RMM Accurancy
2010 Silver Rush 50 MTB & 2010 Leadville Trail 100 MTB 136 1.8 very high
2009 Events Finishers of Both Races RMM Accurancy
2009 Silver Rush 50 MTB & 2009 Leadville Trail 100 MTB 128 1.8 very high
2008 Events Finishers of Both Races RMM Accurancy
2008 Silver Rush 50 MTB & 2008 Leadville Trail 100 MTB 101 1.8 very high
2007 Events Finishers of Both Races RMM Accurancy
2007 Silver Rush 50 MTB & 2007 Leadville Trail 100 MTB 84 1.8 high
2006 Events Finishers of Both Races RMM Accurancy
2005 Silver Rush 50 MTB & 2006 Silver Rush 50 MTB 61 1.0 high
2005 Silver Rush 50 MTB & 2006 Leadville Trail 100 MTB 42 1.8 moderate
2006 Silver Rush 50 MTB & 2006 Leadville Trail 100 MTB 67 1.8 high
2004 Events Finishers of Both Races RMM Accurancy
2004 Silver Rush 50 MTB & 2004 Leadville Trail 100 MTB 55 1.8 high
2003 Events Finishers of Both Races RMM Accurancy
2003 Silver Rush 50 MTB & 2003 Leadville Trail 100 MTB 64 1.8 high
2002 Events Finishers of Both Races RMM Accurancy
2002 Silver Rush 50 MTB & 2002 Leadville Trail 100 MTB 32 1.9 moderate