ANCHOR DOWN       ultra

The smallest state's longest races. 

6 hour, 12 hour & 24 hour ultramarathons

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Course Records

6-Hour Women's Race: 

*Diane Keenan, 2015 Race, 36.9 Miles

*Diane's 36.9 mile run was on the 2015 course. Considering this course provided a "shorter loop" by a slight amount, we would consider a slightly shorter-run to "tie" this record, considering the advantage Diane had in the 2015 race. However Diane also holds the runner-up distance of 34.3 miles during the 2016 race, along with Maureen Darmanin who covered 34.3 miles during the 2018 race, both on the longer loop that was instituted in the 2016 ADU and beyond. Therefore, both women's races are currently honored as "Course Records".

6-Hour Men's Race:

Taylor Days-Merrill, 2016 Race, 44.1 Miles

12-Hour Women's Race:

Diane Keenan, 2018 Race, 63.7 Miles

12-Hour Men's Race:

*Greg Stone, 2015 Race, 67.65 Miles

*Greg's 67.65 mile run was on the 2015 course. Nicholas Mamrack ran 66.15 miles during the 2018 race, with the new, longer course structure. In theory, it is possible Nicholas could have also had a shot at this record under the same course structure as the 2015 race. Therefore, both men's races are currently honored as "Course Records". 

24-Hour Women's Race: 

Laura Marshall, 2018 Race, 102.9 Miles 

24-Hour Men's Race: 

Chris Cappellini, 2016 Race, 129.85 Miles

Results and Race Data



All-Time Distances Run at ADU

(Records of distances run, listed alphabetically, updated annually.)

6-Hour All-Time Distances Run

12-Hour All-Time Distances Run

24-Hour All-Time Distances Run

Top Performances

(A collection of the all-time best performances in each division, listed in order of distance-run, updated annually.)

Best All-Time Performances in 24-Hour

Best All-Time Performances in 12-Hour

Best All-Time Performances in 6-Hour

Yearly Results

("Time" in this data refers to the distance covered.) 


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12 Hour

24 Hour


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24 Hour


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12 Hour

24 Hour


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6 Hour

12 Hour

24 Hour


Results to be posted immediately

following the 2020 ADU. 

100 Mile Finishers

(A complete list of 100 mile finishes at ADU, including records of multiple 100 mile finishers, updated annually.)

All-Time 100 Mile Finishers