Chih-Chien (蔡志堅) Tsai
ID 506569
Born : 1969 Cat. M55 Ultrarunner since 2014 TPE
47
DUV-index ?Largest integer N such that the runner has at least N credited races of at least N km.
50
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
2
Countries visited ?JPNJapanTPETaiwan
48,5%
Rank quotient ?This runner's calculation uses 71 eligible race(s): Σ(rank − 1) = 9 892; Σ finishers = 20 409. 9 892 / 20 409 × 100 = 48.47%. A win adds 0 to the numerator. Lower is better.

Totals

Ultras completed77
Km — ultra races4 617 km
> 100 km3
Longest race118,0 km
28th Fuji 5 Lakes 118 km Challenge — 22/4/2018

Km per year (ultra races)

892
10 races
2022
357
5 races
2023
100
1 race
2024
345
5 races
2025
218
3 races
2026

Race types (share of distance)

Road85,4%
Trail4,5%
Stage6,9%
Ult.Walk3,1%

Wins & podiums (ultra)

🏆 Win2
🏆 Win M2
🏅 Top 37
🏅 Top 3 M7
Longest winning streak1
Current streak0

Records

50 km4h50'49100 km11h57'466 h52,70 km

HISTORY

77 race(s) · 1 split(s) nested
DateRacePerf.Rk
2026
14.06 100km JPN14th Hida Takayama 100 km Ultramarathon 13:35:19 h1223
15.03 54.8km TPE9th 800 Heroes - Sandiaojiao Lighthouse 55km 8:41:21 h21
17.01 63km TPE14th Yangmingshan 63km Ultra Marathon 8:59:45 h47
2025
27.12 55km TPE9th Bei-yi Freeway Ultra Marathon 7:06:46 h167
01.11 100km JPN1st BIWA100 Ultra Walk 19:20:47 h77
08.06 100km JPN13th Hida Takayama 100 km Ultramarathon 13:55:32 h1609
23.03 45km TPE3rd Arouyang Ultra Run 7:17:02 h4
22.03 45km TPE4th Xiugang Jingmei Ultra Run 6:05:36 h3 🥉
2024
09.06 100km JPN12th Hida Takayama 100 km Ultramarathon 13:28:16 h1130
2023
24.06 45km TPE2nd Yuanshan Ultra Run 7:23:44 h1 🏆
11.06 100km JPN11th Hida Takayama 100 km Ultramarathon 13:24:25 h927
09.04 104km TPE6th 800 Heroes - Overlord of Hulien 100km 14:58:50 h60
04.03 63km TPE11th Yangmingshan 63km Ultra Marathon 7:32:14 h30
28.01 45km TPE8th Tour New Year Ultra Run Stage Race - 9.Maokong 5:36:32 h1 🏆
2022
05.11 100km TPE8th Buddha's Palm 100km Ultramarathon 13:26:49 h53
05.10 67km TPE1st Mountains to Sea Greenway 4. Alishan to Yushan 17:29:41 h12
04.10 49km TPE1st Mountains to Sea Greenway 3. Danayigu to Alishan 8:26:32 h9
03.10 58km TPE1st Mountains to Sea Greenway 2. Zengwen Reservoir to Danayigu 9:32:34 h15
02.10 71km TPE1st Mountains to Sea Greenway 1. Yanshui Estuary to Zengwen Reservoir 11:34:46 h16
13.08 45km TPE8th Around Guanshan Ultramarathon Stage Race - Stage 8 6:01:20 h15
11.08 45km TPE8th Around Guanshan Ultramarathon Stage Race - Stage 6 6:32:47 h43
10.08 47km TPE8th Around Guanshan Ultramarathon Stage Race - Stage 5 6:10:49 h23
08.08 46km TPE8th Around Guanshan Ultramarathon Stage Race - Stage 3 6:02:33 h25
07.08 45km TPE8th Around Guanshan Ultramarathon Stage Race - Stage 2 7:40:34 h42
06.08 47km TPE8th Around Guanshan Ultramarathon Stage Race - Stage 1 6:10:00 h25
05.04 58km TPE1st Nanao to Jiaoxi Ultra Run 9:06:53 h21
04.04 54km TPE1st Xincheng to Nanao Ultra Run 8:14:13 h16
03.04 45km TPE1st Fengtian to Xincheng Ultra Run 7:25:51 h26
02.04 52km TPE1st Ruisui to Fengtian Ultra Run 5:51:09 h3 🥉
08.01 63km TPE10th Yangmingshan 63km Ultra Marathon 7:55:08 h49
2021
25.12 55km TPE5th Bei-yi Freeway Ultra Marathon 6:34:45 h55
17.04 45km TPE3rd Dapu to Dongyan Mountain Ultra Run 4:49:56 h4
02.04 45km TPE1st Dajia to Xizhi Ultra Run 6:01:45 h3 🥉
14.03 47km TPE1st Yingge Ultra Run 5:58:55 h6
07.02 46km TPE4th Dasyueshan Ultra Run 5:58:36 h8
06.02 45km TPE8th Daxingshan Temple Ultra Run 5:21:26 h5
24.01 53km TPE6th Jinshui Camp Trail 53km 7:45:49 h38
09.01 50km TPE9th Yangmingshan 50km Ultra Marathon 5:41:00 h23
2020
19.12 106km TPE3rd 800 Heroes - Territory Southward 106km 14:14:48 h44
07.11 100km TPE6th Buddha's Palm 100km Ultramarathon 15:03:48 h104
05.07 49km TPE3rd 800 Heroes - Overlord of Shuishalian 49 km 7:43:20 h17
14.06 45km TPE3rd Walking in the Sand Ultra Run 7:12:57 h12
13.06 45km TPE2nd Dapu to Dongyan Mountain Ultra Run 5:27:46 h12
02.05 46km TPE5th Luoshan North Ultra Run 6:06:32 h21
01.05 46km TPE3rd Lion's Head Mountain Ultra Run 6:56:29 h11
04.04 46km TPE4th Daxingshan Temple Ultra Run 6:20:30 h8
02.04 45km TPE2nd Qionglin to Neiwan Ultra Run 5:13:16 h13
02.02 47km TPE1st Tucheng Ultra Run 6:20:10 h11
2019
14.12 47km TPE1st Qidu to Gongliao Ultra Run 6:54:38 h3 🥉
30.11 47km TPE1st Douliu to Houbi Ultra Run 6:03:09 h3 🥉
03.11 45km TPE4th Datun Mountain Ultra Marathon 5:02:33 h31
08.09 100km JPN7th 100 km Ultramarathon Hakusan-Shirakawago 12:53:56 h196
07.07 46.6km TPE4th Forest of Forget The Sorrow UltraMarathon 6:47:40 h42
02.03 54km TPE2nd Taiwania 54 Ultra Trail 7:35:11 h123
2018
01.12 50km TPE5th Dakeng Ultra Run - 50 km 6:12:34 h32
20.10 50km TPE8th Flex Power National 50K Track Taipei 5:28:07 h48
30.06 56km TPE2nd Dongfong Ultra Marathon - 56 km 6:17:57 h22
10.06 100km JPN7th Hida Takayama 100 km Ultramarathon 11:57:46 h480
22.04 118km JPN28th Fuji 5 Lakes 118 km Challenge 14:09:22 h237
18.03 6h TPE7th National Taipei University 6H Ultra Marathon 47.696 km33
10.03 53km TPE1st Taiwania 53 Ultra Trail 6:37:26 h33
10.02 6h TPE7th Taipei 6hr Ultra Marathon Saturday Run 46.444 km64
2017
11.06 100km JPN6th Hida Takayama 100 km Ultramarathon 12:22:08 h658
19.03 8h TPE6th National Taipei University 8H Ultra Marathon 62.551 km21
2016
26.11 50km TPE5th Yilan Dongshan River 50km Ultra-Marathon 5:51:38 h69
05.06 50km TPE1st Ultra-Trail Yilan 9:19:07 h55
21.02 50km TPE1st Blue Whale Ultramarathon 50 km 5:49:10 h65
31.01 6h TPE5th Taipei 6hr Ultra Marathon Sunday Midnight Run 52.699 km15
02.01 56km TPE4th Jhen-wu-shan UltraMaraton 6:03:19 h145
2015
07.06 100km JPN4th Hida Takayama 100 km Ultramarathon 13:15:33 h768
18.04 50km TPE5th The North Face 50K Challenge Taiwan 6:25:29 h32
10.01 50km TPE1st Yunlin Ultramarathon 4:50:49 h57
2014
13.12 50km TPE3rd Yilan Dongshan River 50km Ultra-Marathon 5:12:06 h142
08.06 72km JPN3rd Hida Takayama 72 km Ultramarathon 9:42:06 h296
12.04 50km TPE4th The North Face 50K Challenge Taiwan 6:53:00 h123
06.04 45.6km TPE1st Mingde Reservoir Ultramarathon 4:52:21 h197
08.03 45km TPE4th Southern Cross-Island Highway 45 km Ultra Marathon 5:02:33 h58