Kaizhi Feng

Bib: 21779 F

Masters

0:00

0:00

/ mi

Masters

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Overall

#0 / 28404

Gender (Female)

#0 / 12228

Masters (Masters Women)

#0 / 6759

Top 44%

Division (F45-49)

#0 / 1813

Race Day Weather

50°/40°F

broken clouds

Race Timeline

Ribbon color based on

FasterSteadySlower· vs. your average pace

Start

0:00

Race begins

469 ft elev

5K· 3.11 mi

8:41/mi

26:59

↑ 97 ft↓ 345 ft1.5% grade

220 ft elev

10K· 6.21 mi

8:19/mi

52:50

↑ 79 ft↓ 138 ft0.4% grade

157 ft elev

15K· 9.32 mi

8:27/mi

1:19:05

↑ 67 ft↓ 78 ft

146 ft elev

20K· 12.43 mi

8:36/mi

1:45:47

↑ 106 ft↓ 86 ft0.1% grade

165 ft elev

Half· 13.11 mi

8:24/mi

1:51:31

↑ 19 ft↓ 37 ft0.5% grade

148 ft elev

25K· 15.53 mi

8:37/mi

2:12:24

↑ 66 ft↓ 88 ft0.2% grade

127 ft elev

30K· 18.64 mi

8:59/mi

2:40:18

↑ 181 ft↓ 148 ft0.2% grade

138 ft elev

20M

9:07/mi

2:52:42

↑ 64 ft↓ 50 ft0.2% grade

148 ft elev

21M

10:05/mi

3:02:47

↑ 106 ft↓ 24 ft1.6% grade

227 ft elev

35K· 21.75 mi

8:55/mi

3:09:27

↑ 17 ft↓ 86 ft1.7% grade

156 ft elev

23M

8:44/mi

3:20:23

↑ 23 ft↓ 63 ft0.6% grade

116 ft elev

24M

8:41/mi

3:29:04

↓ 82 ft1.3% grade

34 ft elev

40K· 24.85 mi

8:59/mi

3:36:45

↓ 20 ft0.3% grade

20 ft elev

25.2M

9:49/mi

3:40:08

↑ 13 ft↓ 16 ft0.2% grade

18 ft elev

Finish· 26.22 mi

8:34/mi

3:48:52

↑ 22 ft↓ 21 ft

17 ft elev

Course Elevation

7–469 ft

≈

×2stacked redwood trees

•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half

1:51:318:30 /mi⚡ faster

2nd Half

1:57:218:57 /mi+5.2%

Positive split — 5.2% slower in the second half

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See your splits, ranks & AI insights.

Checkpoint Splits

Checkpoint	Time	Avg Pace	Segment Length	Segment Time	Segment Pace	Diff
5K	26:59	8:41	3.11 mi	26:59	8:41	-
10K	52:50	8:30	3.10 mi	25:51	8:19	-0:22
15K	1:19:05	8:29	3.11 mi	26:15	8:27	+0:08
20K	1:45:47	8:31	3.11 mi	26:42	8:36	+0:09
Half(13.11 mi)	1:51:31	8:30	0.68 mi	5:44	8:24	-0:12
25K	2:12:24	8:31	2.42 mi	20:53	8:37	+0:13
30K	2:40:18	8:36	3.11 mi	27:54	8:59	+0:22
20M	2:52:42	8:38	1.36 mi	12:24	9:07	+0:08
21M	3:02:47	8:42	1.00 mi	10:05	10:05	+0:58
35K	3:09:27	8:43	0.75 mi	6:40	8:55	-1:10
23M	3:20:23	8:43	1.25 mi	10:56	8:44	-0:11
24M	3:29:04	8:43	1.00 mi	8:41	8:41	-0:03
40K	3:36:45	8:43	0.85 mi	7:41	8:59	+0:18
25.2M	3:40:08	8:44	0.35 mi	3:23	9:49	+0:50
Finish(26.22 mi)	3:48:52	8:44	1.02 mi	8:44	8:34	-1:15

Trend:

Faster pace

Steady pace

Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

8:19 /mi

Average Pace

8:44 /mi

Slowest Pace

10:05 /mi

Loading chart...

Fastest

Middle

Slowest

Average

Segments

Time at Faster Pace

31:35

14% of race

Time at Steady Pace

2:15:50

59% of race

Time at Slower Pace

1:01:27

27% of race

Average Pace: 8:44 /mi

Loading chart...

Faster pace (< avg)

Steady pace (≈ avg)

Slower pace (> avg)

Heatmap

0mi6.6mi13.1mi19.7mi26.2mi

Pace:

Faster

Steady

Slower

Checkpoint and Segment Rankings

Checkpoint	Seg. Dist	Overall	Females	F45-49	Seg. Overall	Seg. Females	Seg. F45-49
5K	3.11 mi	20944	8046	8046	19033	6920	6920
10K	3.10 mi	19858+1086	7390+656	7390+656	18683	6698	6698
15K	3.11 mi	19567+291	7213+177	7213+177	19033	6920	6920
20K	3.11 mi	19341+226	7104+109	7104+109	18818	6805	6805
Half(13.11 mi)	0.68 mi	19303+38	7083+21	7083+21	18650	6709	6709
25K	2.42 mi	19048+255	6946+137	6946+137	17890	6368	6368
30K	3.11 mi	18747+301	6798+148	6798+148	17594	6358	6358
20M	1.36 mi	18632+115	6763+35	6763+35	17452	6397	6397
21M	1.00 mi	18636-4	6796-33	6796-33	18624	7137	7137
35K	0.75 mi	18614+22	6799-3	6799-3	17831	6807	6807
23M	1.25 mi	18353+261	6677+122	6677+122	14762	5212	5212
24M	1.00 mi	18221+132	6639+38	6639+38	15677	5743	5743
40K	0.85 mi	18142+79	6623+16	6623+16	16255	6187	6187
25.2M	0.35 mi	18103+39	6610+13	6610+13	16219	6204	6204
Finish(26.22 mi)	1.02 mi	18062+41	6607+3	6607+3	16701	6406	6406

6406

Passing Analysis

Category:

Passed

3528

Passed By

646

Net Change

+2882

Segment	Passed	Passed By	Net Change	Start Rank	End Rank
Start → 5K	-	-	-	-	#20944
5K → 10K	1126	40	+1086	#20944	#19858
10K → 15K	359	68	+291	#19858	#19567
15K → 20K	316	90	+226	#19567	#19341
20K → Half	51	13	+38	#19341	#19303
Half → 25K	300	45	+255	#19303	#19048
25K → 30K	392	91	+301	#19048	#18747
30K → 20M	158	43	+115	#18747	#18632
20M → 21M	105	109	-4	#18632	#18636
21M → 35K	67	45	+22	#18636	#18614
35K → 23M	266	5	+261	#18614	#18353
23M → 24M	146	14	+132	#18353	#18221
24M → 40K	108	29	+79	#18221	#18142
40K → 25.2M	49	10	+39	#18142	#18103
25.2M → Finish	85	44	+41	#18103	#18062
TOTALS	3528	646	+2882

Passing Charts

Category:

Passing Circle

Position Flow

Race Lanes

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Results processed about 1 month ago

Public Race Data

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Race managed by

Boston Athletic Association

Race timed by

Mika Timing