Amy Sproston
Born : 1974 Cat. W50 Ultrarunner since 2006 USA
53
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
66
DUV-index+ ?Largest integer N such that the race distances provide at least N complete segments of N km in total. A single long race may therefore contribute several segments. See the DUV-Index tab for the detailed calculation. calculation details
13
Countries visited ?ARGArgentinaAUSAustraliaCRCCosta RicaFRAFranceITAItalyJPNJapanKSASaudi ArabiaNCANicaraguaNEDNetherlandsQATQatarRSASouth AfricaTURTürkiyeUSAUnited States
10,9%
Rank quotient ?This runner's calculation uses 75 eligible race(s): Σ(rank − 1) = 3 870; Σ finishers = 35 663. 3 870 / 35 663 × 100 = 10.85%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed75
Km — ultra races7 073 km
> 100 km15
> 160 km12
> 200 km1
Longest race330,0 km

Km per year (ultra races)

2022
2023
2024
2025
2026

Race types (share of distance)

Road12,6%
Trail87,4%

Wins & podiums (ultra)

🏆 Win1
🏆 Win F30
🏅 Top 34
🏅 Top 3 F48
Longest winning streak1
Current streak0

HISTORY

76 race(s)
DateRacePerf.Rk
2020
08.02 83km KSA1st EcoTrail AlUla 83 km 10:02:17 h5
2019
08.09 330km ITA10° Tor des Géants - 330 km Endurance Trail della Valle d'Aosta 4d 11:15:21 h66
2018
22.06 120km ITA12^ Lavaredo Ultra Trail by UTMB - 120K 18:22:28 h123
19.05 50mi USA13th Jemez Mountain 50mi Trail Run 10:58:55 h32
14.04 50mi USA10th Lake Sonoma 50 Mile Race 8:27:21 h34
2017
01.09 167.7km FRA15ème Ultra Trail Tour du Mont Blanc 28:44:08 h96
22.07 50km USA6th Catherine's 50k Run 5:09:00 h3 🥉
27.05 50km CRC3rd Endurance Challenge Costa Rica 50 km 4:58:44 h7
20.05 50mi USA32nd Silver State 50 Mile 9:08:40 h9
2016
25.06 100mi USA43rd Western States 100 Mile Endurance Run 18:54:44 h21
30.04 50mi USATillamook Burn Trail Run 50 Mile 8:17:56 h2 🥈
23.04 50mi USA27th Zane Grey 50 Mile Endurance Run 11:22:39 h12
13.02 100km USA3rd Black Canyon Trail 100 km Run 10:09:34 h11
2015
25.09 170.3km JPN4th Ultra-Trail Mt. Fuji 30:40:11 h70
16.05 100km AUS8th The North Face 100 Australia 11:27:50 h35
17.01 100mi USA15th HURT 100 Endurance Run 100 Mile 26:22:39 h8
2014
21.11 100km QATIAU 100km World Championship - open race 8:14:02 h78
21.11 100km QATWMA 100km Championship 8:14:02 h19
21.11 100km QAT27th IAU 100km World Championship 8:14:02 h78
12.10 71.5km JPN22nd Hasetsune Cup - Japan Mountain Endurance Race 9:31:18 h65
01.06 89km RSA89th Comrades Marathon - Down Run 8:52:20 h2005
12.04 100km ARG4° Patagonia Run 100 km 12:55:16 h7
07.02 88km ARG13. El Cruce Columbia 8:11:59 h17
2013
13.10 71.5km JPN21st Hasetsune Cup - Japan Mountain Endurance Race 9:44:47 h72
03.08 32.5mi USA6th Martha Moats Baker Memorial 50k 6:15:00 h6
29.06 100mi USA40th Western States 100 Mile Endurance Run 19:25:11 h16
01.06 100km JPN1st Tokyo Shibamata 100 km 7:50:32 h4
20.04 80km TUROrhangazi Ultra Marathon 80 km 7:12:51 h1 🏆
13.04 50mi USA5th Lake Sonoma 50 Mile Race 8:04:11 h27
02.02 50mi USA2nd Ray Miller 50 Mile Trail Race 8:38:20 h10
2012
31.08 103.4km trail race FRA10ème Ultra Trail Tour du Mont Blanc (UTMB) 14:13:35 h68
23.06 100mi USA39th Western States 100 Mile Endurance Run 19:11:02 h37
20.05 50mi USA4th Sun Mountain 50 Mile Trail Races 7:21:59 h5
22.04 100km ITAWMA 100km WC Seregno 7:34:07 h11
22.04 100km ITA26th IAU 100km WC Seregno 7:34:07 h44
25.02 50mi USA1st Ray Miller 50 Mile Trail Race 8:10:53 h6
04.02 50km USA7th Orcas Island 50k 5:32:33 h17
2011
10.12 100km USA9th Hellgate 100 km 12:23:40 h4
10.09 100km NEDIAU 100km WC (RUN Winschoten 100 km) 8:10:11 h66
10.09 50km NED36. RUN Winschoten 100 km - 50km Split 3:59:47 h69
10.09 100km NED36. RUN Winschoten 100 km 8:10:11 h69
30.07 50mi USA13th Mt. Hood 50 Mile Trail Run 7:30:48 h8
25.06 100mi USA38th Western States 100 Mile Endurance Run 19:36:19 h34
07.05 100km USA16th Miwok 100k Trail race 10:02:41 h32
19.03 50km USA19th Chuckanut 50K 4:52:28 h40
2010
20.11 50mi USA48th JFK 50 Mile 6:57:16 h25
18.09 100mi USA1st Pine to Palm 100 Mile Endurance Run 22:39:00 h6
04.09 50km USA3rd Three Corner Rock PCT (Bunker to Bonneville) 5:35:50 h5
21.08 100km USA9th Where's Waldo 100K Ultramarathon 11:02:37 h13
31.07 50mi USA18th White River 50 Mile Trail Run 8:22:03 h20
10.07 50km USA12th Siskiyou Out Back 50 km Trail Run 4:40:01 h9
01.05 100km USA15th Miwok 100k Trail race 10:02:41 h27
2009
22.08 100km USA8th Where's Waldo 100K Ultramarathon 12:04:35 h21
13.06 70.5mi USA30th Laurel Highlands 70 Mile Ultra 14:02:41 h9
16.05 100mi USA15th Massanutten Mountain Trails 100 Mile 24:59:55 h10
25.04 50km USA9th Promise Land 50K++ 6:00:54 h17
18.04 50mi USA17th Bull Run Run 50 Miler 7:34:05 h9
28.03 50mi USA5th Bel Monte 50 Mile Endurance Run 9:26:23 h6
2008
13.12 100km NCA1st Ultramaraton Fuego Y Agua 100 km 13:12:00 h3 🥉
02.08 50km USA13th Catoctin 50k Trail Run 5:54:16 h8
17.05 100mi USA14th Massanutten Mountain Trails 100 Mile 26:08:57 h10
26.04 50km USA8th Promise Land 50K++ 6:10:07 h28
12.04 50mi USA16th Bull Run Run 50 Miler 9:28:49 h44
21.03 100km USA1st Coyote Two Moon Ultras 100 km 14:33:00 h4
16.02 50km USA13th Holiday Lake 50K++ 4:44:23 h27
2007
15.12 50km USA12th Magnus Gluteus Maximus 50 km 5:35:00 h21
15.09 12h USA2nd 12 Hour Adventure Trail Run 52.303 km30
04.08 50km USA12th Catoctin 50k Trail Run 6:17:54 h14
15.06 100mi USA16th Bighorn Mountain Wild & Scenic 100mi Trail Run 31:21:02 h41
12.05 50km USA9th Capon Valley 50K Run 5:00:24 h15
28.04 50km USA7th Promise Land 50K++ 6:07:43 h45
14.04 50mi USA15th Bull Run Run 50 Miler 7:43:48 h15
03.03 50km USA3rd Seneca Creek Greenway Trail 50k 5:06:38 h7
03.02 40mi USA15th Uwharrie Mountain Run 8:01:00 h21
13.01 50km USA2nd Elizabeth's Furnace Fat Ass 50 km Race 7:08:00 h9
2006
04.11 50mi USA24th Mountain Masochist 50 Mile Trail Run 9:32:45 h46