Dai, William

Born 19692012 – 2026

Events

2012 – 2026

Best pace

12.459

km/h · 2016

Best finish

1st

of 42 · 2015

Distance raced

7,574

km · splits not double-counted

Pace over time

km/h · higher is faster

Actual pace
Age-graded pace

Results

Every result for this runner in date order. Splits of a race are indented under it and are not counted again in the distance total.
Date	Event	Distance	Result	Pace km/h	Placing
2012-07-07	Dirty Dozen 6h Endurance RunUnited States	6h	48.811 km	8.135	19/31
2013-02-24	San Bruno Mountain 50 Mile UltramarathonUnited States	50mi	10:55:21 h	7.367	10/28
2013-04-20	Ruth Anderson Ultra 50kmUnited States*CA	50km	4:17:20 h	11.658	5/55
2013-07-14	Pacifica 50 Km Trail RunUnited States*San Francisco, CA	50km	6:09:05 h	8.128	8/16
2013-08-11	Skyline 50k Endurance RunUnited States*San Francisco, CA	50km	5:07:44 h	9.749	47/240
2013-08-24	Tamalpa Headlands 50KUnited States*San Francisco, CA	31.5mi	5:54:54 h	8.570	57/181
2014-04-19	Ruth Anderson Ultra 100kmUnited States	100km	10:15:18 h	9.751	5/10
2014-05-10	Quicksilver 50 km Endurance RunUnited States*San Francisco, CA	50km	4:57:54 h	10.070	12/122
2014-05-18	Ohlone 50K Wilderness RunUnited States*San Francisco, CA	50km	5:55:18 h	8.444	24/176
2014-06-21	San Francisco Summer Solstice 24hUnited States*San Francisco, CA	24h	162.213 km	6.759	11/46
2014-08-23	Tamalpa Headlands 50KUnited States*San Francisco, CA	31.5mi	5:43:39 h	8.851	47/187
2014-12-28	Woodside Trail Run 50KUnited States*San Francisco, CA	50km	4:54:32 h	10.186	12/95
2015-01-31	Fremont Fat Ass 50kUnited States*San Francisco, CA	50km	4:50:00 h	10.345	3/64
2015-02-22	West Coast 50KUnited States*San Francisco, CA	50km	5:32:28 h	9.023	4/12
2015-04-18	Ruth Anderson Ultra 100kmUnited States	100km	9:54:54 h	10.086	4/12
2015-05-09	Quicksilver 100 km Endurance RunUnited States*San Francisco, CA	100km	12:38:44 h	7.908	51/181
2015-05-16	Silver State 50 MileUnited States	50mi	9:23:55 h	8.562	18/82
2015-06-20	San Francisco Summer Solstice 24hUnited States*San Francisco, CA	24h	191.241 km	7.968	5/59
2015-08-08	Skyline 50k Endurance RunUnited States*San Francisco, CA	50km	4:58:14 h	10.059	26/163
2015-08-29	Tamalpa Headlands 50KUnited States*San Francisco, CA	31.5mi	5:38:04 h	8.997	72/220
2015-09-12	Headlands Hundred 100 Mile Endurance RunUnited States*San Francisco, CA	100mi	21:54:38 h	7.345	2/26
2015-10-10	Dick Collins Firetrails 50 MileUnited States*San Francisco, CA	50mi	9:26:57 h	8.516	33/186
2015-11-28	Quad Dipsea Trail RunUnited States*San Francisco, CA	28mi	6:13:13 h	7.244	103/280
2015-12-06	Hunter S. Thompson Fear & Loathing 50 KmUnited States*San Francisco, CA	50km	4:54:00 h	10.204	1/42
2015-12-27	Woodside Trail Run 50KUnited States*San Francisco, CA	50km	5:03:15 h	9.893	12/70
2016-02-06	Jed Smith Ultra Classic - 50 Km RaceUnited States	50km	4:00:47 h	12.459	13/79
2016-04-16	Ruth Anderson Ultra 50kmUnited States	50km	4:21:15 h	11.483	5/32
2016-05-07	Miwok 100k Trail RaceUnited States*San Francisco, CA	100km	12:36:00 h	7.937	98/289
2016-05-14	Quicksilver 100 km Endurance RunUnited States*San Francisco, CA	100km	12:38:55 h	7.906	25/165
2016-07-16	Tahoe Rim Trail 100M Endurance RunUnited States*San Francisco, CA	100mi	25:20:58 h	6.349	18/154
2016-10-08	Skyline to the Sea 50kmUnited States*San Francisco, CA	50km	5:47:59 h	8.621	18/138
2016-11-26	Quad Dipsea Trail RunUnited States	28mi	6:07:30 h	7.357	76/275
2016-12-04	Hunter S. Thompson Fear & Loathing 50 KmUnited States*San Francisco, CA	50km	6:14:09 h	8.018	13/41
2017-02-18	FOURmidable 50KUnited States*San Francisco, CA	50km	5:48:44 h	8.603	52/181
2017-03-11	Marin Ultra Challenge 50 Mile RaceUnited States*San Francisco, CA	50mi	9:34:05 h	8.410	17/136
2017-04-23	Ruth Anderson Ultra 50kmUnited States	50km	4:15:38 h	11.736	5/22
2017-05-06	Miwok 100k Trail RaceUnited States	100km	12:03:11 h	8.297	65/285
2017-05-13	Quicksilver 100 km Endurance RunUnited States*San Francisco, CA	100km	12:50:23 h	7.788	32/158
2017-05-21	Ohlone 50K Wilderness RunUnited States*San Francisco, CA	50km	7:09:15 h	6.989	35/128
2017-08-06	Skyline 50k Endurance RunUnited States	50km	5:18:48 h	9.410	39/196
2017-08-26	Tamalpa Headlands 50KUnited States*San Francisco, CA	31.5mi	6:19:30 h	8.015	35/177
2017-10-07	Dick Collins Firetrails 100 kmUnited States*San Francisco, CA	100km	13:27:18 h	7.432	13/37
2017-11-04	Rio Del Lago 100 Mile Endurance RunUnited States*San Francisco, CA	100mi	21:37:58 h	7.439	37/298
2017-11-25	Quad Dipsea Trail RunUnited States	28mi	6:09:14 h	7.322	75/300
2018-02-03	Jed Smith Ultra Classic - 50 Km RaceUnited States*San Francisco, CA	50km	4:24:58 h	11.322	12/46
2018-02-17	FOURmidable 50KUnited States	50km	5:31:26 h	9.052	26/149
2018-04-07	Napa Valley 50k Trail RaceUnited States	50km	7:11:16 h	6.956	16/51
2018-04-22	Ruth Anderson Ultra 100kmUnited States	100km	10:29:13 h	9.536	3/10
2018-05-19	Silver State 50 MileUnited States*San Francisco, CA	50mi	11:01:14 h	7.302	37/78
2018-08-25	Tamalpa Headlands 50KUnited States*San Francisco, CA	31.5mi	5:48:03 h	8.739	24/166
2018-09-15	Folsom Lake Ultra TrailUnited States*San Francisco, CA	110km	14:39:01 h	7.508	10/47
2018-11-03	Rio Del Lago 100 Mile Endurance RunUnited States*San Francisco, CA	100mi	23:24:14 h	6.876	49/250
2018-11-24	Quad Dipsea Trail RunUnited States*San Francisco, CA	28mi	5:53:23 h	7.651	52/279
2018-12-08	Hunter S. Thompson Fear & Loathing 50 KmUnited States*San Francisco, CA	50km	6:45:00 h	7.407	18/47
2019-02-02	Jed Smith Ultra Classic - 50 Km RaceUnited States*San Francisco, CA	50km	4:31:02 h	11.069	14/50
2019-02-16	FOURmidable 50KUnited States*San Francisco, CA	50km	5:24:28 h	9.246	46/188
2019-03-02	Way Too Cool 50K Endurance RunUnited States*San Francisco, CA	50km	4:57:40 h	10.078	84/612
2019-04-06	American River 50 Mile Endurance RunUnited States*San Francisco, CA	50mi	8:58:03 h	8.973	37/363
2019-05-04	Miwok 100k Trail RaceUnited States*San Francisco, CA	100km	11:29:00 h	8.708	31/271
2019-05-11	Quicksilver 100 km Endurance RunUnited States*San Francisco, CA	100km	14:15:06 h	7.017	52/148
2019-05-19	Ohlone 50K Wilderness RunUnited States*San Francisco, CA	50km	6:27:44 h	7.737	19/111
2019-07-20	Tahoe Rim Trail 100M Endurance RunUnited States*San Francisco, CA	100mi	31:08:54 h	5.167	77/156
2019-08-24	Tamalpa Headlands 50KUnited States*San Francisco, CA	31.5mi	5:32:18 h	9.153	24/143
2019-09-14	Headlands Hundred 100 Mile Endurance RunUnited States*San Francisco, CA	100mi	26:45:19 h	6.015	16/48
2019-10-05	Dick Collins Firetrails 50 MileUnited States*San Francisco, CA	50mi	9:39:49 h	8.327	12/80
2019-10-12	Ruth Anderson Ultra 100kmUnited States	100km	10:31:37 h	9.499	1/4
2019-11-30	Quad Dipsea Trail RunUnited States*San Francisco, CA	28mi	5:51:15 h	7.697	62/274
2020-02-01	Jed Smith Ultra Classic - 50 Km RaceUnited States*San Francisco, CA	50km	4:11:55 h	11.909	10/60
2020-02-15	FOURmidable 50KUnited States*San Francisco, CA	50km	5:22:26 h	9.304	35/200
2020-03-07	Way Too Cool 50K Endurance RunUnited States*San Francisco, CA	50km	4:37:56 h	10.794	69/572
2020-03-14	Pioneer Spirit 50MUnited States*San Francisco, CA	50mi	9:25:22 h	8.540	27/67
2022-08-07	Skyline 50k Endurance RunUnited States*San Francisco, CA	50km	5:32:59 h	9.009	37/197
2022-09-24	Dick Collins Firetrails 50 MileUnited States*San Francisco, CA	50mi	10:41:45 h	7.523	19/96
2022-10-08	Ruth Anderson Ultra 50kmUnited States	50km	4:55:39 h	10.147	12/54
2022-11-05	Rio Del Lago 100 Mile Endurance RunUnited States*San Francisco, CA	100mi	22:09:16 h	7.264	22/194
2023-02-18	FOURmidable 50KUnited States*San Francisco, CA	50km	5:33:46 h	8.988	53/209
2023-04-08	Lake Sonoma 50 Mile RaceUnited States	50mi	10:26:42 h	7.704	57/215
2023-05-13	Quicksilver 100 km Endurance RunUnited States*San Francisco, CA	100km	14:46:01 h	6.772	38/99
2023-07-15	Tahoe Rim Trail 100M Endurance RunUnited States*San Francisco, CA	100mi	27:46:39 h	5.794	24/115
2023-09-03	Crystal Springs 50 km Summer Trail RunUnited States*San Francisco, CA	50km	5:18:00 h	9.434	5/43
2023-09-30	Dick Collins Firetrails 50 MileUnited States*San Francisco, CA	50mi	9:28:54 h	8.487	10/98
2023-10-14	Ruth Anderson Ultra 50kmUnited States	50km	4:29:31 h	11.131	14/60
2023-11-25	Quad Dipsea Trail RunUnited States*San Francisco, CA	28mi	5:52:06 h	7.679	97/338
2024-03-02	North Marin Ridge 50km RunUnited States*San Francisco, CA	50km	5:28:30 h	9.132	3/25
2024-05-04	Miwok 100k Trail RaceUnited States*CA	100km	12:49:40 h	7.796	56/222
2024-07-19	Cascade Crest Classic 100 MileUnited States*San Francisco, CA	100mi	27:49:47 h	5.783	48/124
2024-09-29	Dick Collins Firetrails 50 MileUnited States*San Francisco, CA	50mi	10:08:56 h	7.929	13/75
2024-11-30	Quad Dipsea Trail RunUnited States	28mi	5:38:38 h	7.984	65/265
2024-12-21	Woodside Ramble 50K - WinterUnited States*San Francisco, CA	50km	5:22:00 h	9.317	17/76
2025-02-22	Montara Mountain 50 km Trail RunUnited States*San Francisco, CA	50km	5:30:27 h	9.079	9/38
2025-05-10	Quicksilver 100 km Endurance RunUnited States*San Francisco, CA	100km	13:34:43 h	7.365	30/128
2025-06-06	San Diego 100 Mile Endurance RunUnited States*San Francisco, CA	100mi	28:11:18 h	5.709	46/135
2025-06-28	Western States 100 Mile Endurance RunUnited States	100mi	23:33:00 h	6.834	80/285
2025-10-11	Ruth Anderson Ultra 50miUnited States*San Francisco, CA	50mi	8:06:37 h	9.922	4/18
2025-11-29	Quad Dipsea Trail RunUnited States*San Francisco, CA	28.4mi	5:41:43 h	8.025	62/259
2026-03-14	Marin Ultra Challenge 50 Mile RaceUnited States*San Francisco, CA	50mi	9:26:02 h	8.530	26/175
2026-05-09	Quicksilver 100 km Endurance RunUnited States*San Francisco, CA	100km	14:21:03 h	6.968	82/179