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Marathon Deutsche Weinstraße 2026   HaWei50 50km Ultralauf 28.2.2026   3h, 6h, 12h, 24h of Santander  
Name: Riefenberg, Dan   Submit Personal Website Send Link 
Club: Libertyville Running Club 
Residence: Libertyville, IL
Year of birth: 1982 (Cat. german: M40)
Date of birth: 00.00.0000 (Cat. internat.: M40)
Nationality: USA USA United States
RunnerID: 818631
 

29 search results (29 Events, 3590.453 km).  (More)

2025 2 Events, 210.934 km  (More)
09.-10.05.2025 The Hellbender One Hundred (USA) 100mi
26:44:44 h Riefenberg, Dan *Huntsville, AL  Overall: 36 M: 32 Cat M40: 10
25.01.2025 Mountain Mist 50k (USA) 50km
5:20:02 h Riefenberg, Dan *Huntsville, AL  Overall: 21 M: 21 Cat M40: 3
2024 4 Events, 310.934 km  (More)
31.12.2024 HTC Recover From the Holidays 50K (USA) 50km
4:29:36 h Riefenberg, Dan *Huntsville, AL  Overall: 5 M: 5 Cat M40: 1
16.11.2024 Dizzy Fifties - 50 km Trail Run (USA) 50km
4:34:59 h Riefenberg, Dan *Huntsville, AL  Overall: 2 M: 2 Cat M40: 1
05.-06.10.2024 Arkansas Traveller 100 (USA) 100mi
20:33:37 h Riefenberg, Dan *AL  Overall: 9 M: 9 Cat M40: 3
10.08.2024 In the Heat of the Night 50km (USA) 50km
4:35:36 h Riefenberg, Dan *Huntsville, AL  Overall: 2 M: 2 Cat M40: 1
2023 1 Event, 119.091 km  (More)
25.-26.03.2023 Georgia Death Race (USA) 74mi
18:29:49 h Riefenberg, Dan *Roswell, GA  Overall: 23 M: 19 Cat M40: 7
2021 1 Event, 160.934 km  (More)
12.-13.06.2021 Kettle Moraine 100 Mile Endurance Run (USA) 100mi
25:43:34 h Riefenberg, Dan *Libertyville, IL  Overall: 21 M: 17 Cat M35: 8
2019 5 Events, 481.934 km  (More)
21.09.2019 The Barkley Fall Classic (USA) 50km
10:41:45 h Riefenberg, Dan *Libertyville, IL  Overall: 18 M: 12 Cat M35: 3
30.08.-01.09.2019 Ultra Trail Tour du Mont Blanc (UTMB) (FRA) 171km
35:57:40 h Riefenberg, Dan Libertyville Running Club  Overall: 351 M: 317 Cat M35: 76
13.07.2019 Dances with Dirt - Devil's Lake 50M Ultra (USA) 50mi
9:27:42 h Riefenberg, Dan   Overall: 5 M: 5 Cat M35: 4
11.05.2019 Ice Age Trail 50 Mile Run (USA) 50mi
8:05:34 h Riefenberg, Dan   Overall: 22 M: 21 Cat M35: 5
16.02.2019 Black Canyon Trail 100 Km Run (USA) 100km
11:11:41 h Riefenberg, Dan *Carpentersville, IL  Overall: 95 M: 82 Cat M35: 20
2018 4 Events, 563.269 km  (More)
13.-14.10.2018 Indiana Trail 100 Mile (USA) 100mi
21:29:34 h Riefenberg, Dan *Carpentersville, IL  Overall: 12 M: 12 Cat M35: 3
17.-18.08.2018 Lean Horse Ultra-Marathon 100 Mile (USA) 100mi
20:37:19 h Riefenberg, Dan *Carpentersville, IL  Overall: 6 M: 5 Cat M35: 2
14.07.2018 Dances with Dirt - Devil's Lake 50M Ultra (USA) 50mi
8:50:56 h Riefenberg, Dan   Overall: 1 M: 1 Cat M35: 1
19.-20.05.2018 Keys100 Ultra-Marathons 100mi (USA) 100mi
20:23:49 h Riefenberg, Dan *Carpentersville, IL  Overall: 14 M: 12 Cat M35: 2
2017 8 Events, 1160.555 km  (More)
07.-08.10.2017 The Hennepin Hundred - 100 Mile Run (USA) 100mi
19:04:13 h Riefenberg, Dan *Carpentersville, IL  Overall: 12 M: 11 Cat M23: 5
16.-17.09.2017 Mark Twain 100 Mile Endurance Run (USA) 100mi
27:41:32 h Riefenberg, Dan *Carpentersville, IL  Overall: 5 M: 5 Cat M23: 1
05.-06.08.2017 Silverheels Trail Run - 100mi (USA) 103mi
35:42:00 h Riefenberg, Dan *Carpentersville,   Overall: 9 M: 8 Cat M23: 3
03.-04.06.2017 Kettle Moraine 100 km Endurance Run (USA) 100km
12:02:23 h Riefenberg, Dan *Carpenterville, IL  Overall: 11 M: 10 Cat M23: 5
19.-21.05.2017 Cruel Jewel 100 Mile (USA) 106mi
33:01:59 h Riefenberg, Dan *Fox River Grove, IL  Overall: 11 M: 11 Cat M23: 3
29.-30.04.2017 Indiana Trail 100 Mile (USA) 100mi
22:36:28 h Riefenberg, Dan *Fox River Grove, IL  Overall: 15 M: 14 Cat M23: 5
18.-19.03.2017 Lake Martin 100 Mile Ultra Trail Race (USA) 100mi
21:13:24 h Riefenberg, Dan *Fox River Grove, IL  Overall: 1 M: 1 Cat M23: 1
11.03.2017 Land Between The Lakes 50 Mile Trail Run (USA) 50mi
8:03:41 h Riefenberg, Dan *Fox River Grove, IL  Overall: 7 M: 7 Cat M23: 3
2016 4 Events, 582.802 km  (More)
05.-06.11.2016 Pinhoti 100 Mile (USA) 100mi
23:12:18 h Riefenberg, Dan *Fox River Grove, IL  Overall: 19 M: 17 Cat M23: 6
17.-18.09.2016 Mark Twain 100 Mile Endurance Run (USA) 100mi
26:01:42 h Riefenberg, Dan   Overall: 2 M: 2 Cat M23: 1
05.-07.08.2016 Ouray 100 Mile Endurance Run (USA) 100mi
2d 02:25:00 h Riefenberg, Dan *Fox River Grove, IL  Overall: 5 M: 5 Cat M23: 4
04.-05.06.2016 Kettle Moraine 100 km Endurance Run (USA) 100km
12:43:21 h Riefenberg, Dan *Fox River Grove, IL  Overall: 8 M: 6 Cat M23: 2

Personal bests

Your list of personal best performances only contains performances of races which can be included into rankings.

In brackets rank in yearly international/national rankings.

 PB 2025 2024 2023 2021 2019 2018 2017 2016

Comparison table

Comparison of performances in races with multiple participations

   2025 2024 2023 2021 2019 2018 2017 2016
Indiana Trail 100 Mile 2           21:29:34 22:36:28  
Dances with Dirt - Devil's Lake 50M Ultra 2         9:27:42 8:50:56    
Mark Twain 100 Mile Endurance Run 2             27:41:32 26:01:42
Kettle Moraine 100 km Endurance Run 2             12:02:23 12:43:21