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BOSTON MARATHON 2025

Chunfang Zhao

Bib: 21095•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 40%
Masters (Masters Women)
#0 / 6759
Top 26%
Division (F50-54)
#0 / 1303
Top 17%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:52
Rank: #16630
Start → 5K
24:52 | 8:00/mi
10K· 6.21 mi
49:47
Rank: #16614 (+16)
5K → 10K
24:55 | 8:01/mi
15K· 9.32 mi
1:15:09
Rank: #16801 (-187)
10K → 15K
25:22 | 8:10/mi
20K· 12.43 mi
1:41:02
Rank: #16896 (-95)
15K → 20K
25:53 | 8:20/mi
Half· 13.11 mi
1:46:31
Rank: #16856 (+40)
20K → Half
5:29 | 8:02/mi
25K· 15.53 mi
2:06:41
Rank: #16679 (+177)
Half → 25K
20:10 | 8:19/mi
30K· 18.64 mi
2:33:45
Rank: #16517 (+162)
25K → 30K
27:04 | 8:43/mi
20M
2:45:17
Rank: #16274 (+243)
30K → 20M
11:32 | 8:29/mi
21M
2:54:23
Rank: #16106 (+168)
20M → 21M
9:06 | 9:06/mi
35K· 21.75 mi
3:00:14
Rank: #15882 (+224)
21M → 35K
5:51 | 7:49/mi
23M
3:10:33
Rank: #15615 (+267)
35K → 23M
10:19 | 8:14/mi
24M
3:18:27
Rank: #15380 (+235)
23M → 24M
7:54 | 7:54/mi
40K· 24.85 mi
3:25:24
Rank: #15198 (+182)
24M → 40K
6:57 | 8:08/mi
25.2M
3:28:27
Rank: #15111 (+87)
40K → 25.2M
3:03 | 8:51/mi
Finish· 26.22 mi
3:36:36
Rank: #15002 (+109)
25.2M → Finish
8:09 | 8:00/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:46:31
Pace8:08 /mi
2nd Half
Distance13.11 mi
Time1:50:05
Pace8:24 /mi
📊Positive Split: 3.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:4024:528:0024:52
8:00
-
10K
6.21 mi11:42:3549:478:0124:55
8:01
+0:01
15K
9.32 mi12:07:571:15:098:0425:22
8:10
+0:09
20K
12.43 mi12:33:501:41:028:0825:53
8:20
+0:10
Half
13.11 mi12:39:191:46:318:085:29
8:02
-0:18
25K
15.53 mi12:59:292:06:418:0920:10
8:19
+0:17
30K
18.64 mi13:26:332:33:458:1527:04
8:43
+0:24
20M
20.00 mi13:38:052:45:178:1611:32
8:29
-0:14
21M
21.00 mi13:47:112:54:238:189:06
9:06
+0:37
35K
21.75 mi13:53:023:00:148:175:51
7:49
-1:17
23M
23.00 mi14:03:213:10:338:1710:19
8:14
+0:25
24M
24.00 mi14:11:153:18:278:167:54
7:54
-0:20
40K
24.85 mi14:18:123:25:248:166:57
8:08
+0:14
25.2M
25.20 mi14:21:153:28:278:163:03
8:51
+0:43
Finish
26.22 mi14:29:243:36:368:168:09
8:00
-0:51

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:49 /mi

Average Pace

8:16 /mi

Slowest Pace

9:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:57:23

82% of race

Time at Steady Pace

39:13

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:16 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:17:4024:528:0024:52
8:00
#16630
10K
6.21 mi11:42:3549:478:0124:55
8:01
#16614
15K
9.32 mi12:07:571:15:098:0425:22
8:10
#16801
20K
12.43 mi12:33:501:41:028:0825:53
8:20
#16896
Half
13.11 mi12:39:191:46:318:085:29
8:02
#16856
25K
15.53 mi12:59:292:06:418:0920:10
8:19
#16679
30K
18.64 mi13:26:332:33:458:1527:04
8:43
#16517
20M
20.00 mi13:38:052:45:178:1611:32
8:29
#16274
21M
21.00 mi13:47:112:54:238:189:06
9:06
#16106
35K
21.75 mi13:53:023:00:148:175:51
7:49
#15882
23M
23.00 mi14:03:213:10:338:1710:19
8:14
#15615
24M
24.00 mi14:11:153:18:278:167:54
7:54
#15380
40K
24.85 mi14:18:123:25:248:166:57
8:08
#15198
25.2M
25.20 mi14:21:153:28:278:163:03
8:51
#15111
Finish
26.22 mi14:29:243:36:368:168:09
8:00
#15002
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi166305533553317171(Top 60%)5827(Top 48%)5827(Top 447%)
10K6.21 mi3.10 mi16614+165502+315502+3116644(Top 59%)5507(Top 45%)5507(Top 423%)
15K9.32 mi3.11 mi16801-1875607-1055607-10517171(Top 60%)5827(Top 48%)5827(Top 447%)
20K12.43 mi3.11 mi16896-955677-705677-7017110(Top 60%)5829(Top 48%)5829(Top 447%)
Half13.11 mi0.68 mi16856+405646+315646+3116213(Top 57%)5300(Top 43%)5300(Top 407%)
25K15.53 mi2.42 mi16679+1775574+725574+7216032(Top 56%)5327(Top 44%)5327(Top 409%)
30K18.64 mi3.11 mi16517+1625535+395535+3916068(Top 57%)5499(Top 45%)5499(Top 422%)
20M20.00 mi1.36 mi16274+2435419+1165419+11613728(Top 48%)4377(Top 36%)4377(Top 336%)
21M21.00 mi1.00 mi16106+1685360+595360+5914131(Top 50%)4704(Top 38%)4704(Top 361%)
35K21.75 mi0.75 mi15882+2245256+1045256+10411053(Top 39%)3151(Top 26%)3151(Top 242%)
23M23.00 mi1.25 mi15615+2675137+1195137+11911688(Top 41%)3586(Top 29%)3586(Top 275%)
24M24.00 mi1.00 mi15380+2355028+1095028+10910600(Top 37%)3111(Top 25%)3111(Top 239%)
40K24.85 mi0.85 mi15198+1824957+714957+7111146(Top 39%)3491(Top 29%)3491(Top 268%)
25.2M25.20 mi0.35 mi15111+874919+384919+3811034(Top 39%)3528(Top 29%)3528(Top 271%)
Finish26.22 mi1.02 mi15002+1094877+424877+4212899(Top 45%)4382(Top 36%)4382(Top 336%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 60%
×21stories
+97ft-345ft

Overall

17171

Females

5827

F50-54

5827

5K→10K

3.1 - 6.2 mi

Top 59%
×5stories
+79ft-138ft

Overall

16644

Females

5507

F50-54

5507

10K→15K

6.2 - 9.3 mi

Top 60%
×3stories
+67ft-78ft

Overall

17171

Females

5827

F50-54

5827

15K→20K

9.3 - 12.4 mi

Top 60%
×5stories
+106ft-86ft

Overall

17110

Females

5829

F50-54

5829

20K→Half

12.4 - 13.1 mi

Top 57%
×2stories
+19ft-37ft

Overall

16213

Females

5300

F50-54

5300

Half→25K

13.1 - 15.5 mi

Top 56%
×4stories
+66ft-88ft

Overall

16032

Females

5327

F50-54

5327

25K→30K

15.5 - 18.6 mi

Top 57%
×9stories
+181ft-148ft

Overall

16068

Females

5499

F50-54

5499

30K→20M

18.6 - 20.0 mi

Top 48%
×5stories
+64ft-50ft

Overall

13728

Females

4377

F50-54

4377

20M→21M

20.0 - 21.0 mi

Top 50%
×8stories
+106ft-24ft

Overall

14131

Females

4704

F50-54

4704

21M→35K

21.0 - 21.8 mi

Top 39%
×7stories
+17ft-86ft

Overall

11053

Females

3151

F50-54

3151

35K→23M

21.8 - 23.0 mi

Top 41%
×5stories
+23ft-63ft

Overall

11688

Females

3586

F50-54

3586

23M→24M

23.0 - 24.0 mi

Top 37%
×6stories
+12ft-82ft

Overall

10600

Females

3111

F50-54

3111

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

11146

Females

3491

F50-54

3491

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

11034

Females

3528

F50-54

3528

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2stories
+22ft-21ft

Overall

12899

Females

4382

F50-54

4382

Passing Analysis

Category:
Athletes Passed
2831
Passed By
1203
Net Change
+1628
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16630
5K → 10K310294+16#16630#16614
10K → 15K154341-187#16614#16801
15K → 20K162257-95#16801#16896
20K → Half5717+40#16896#16856
Half → 25K25174+177#16856#16679
25K → 30K297135+162#16679#16517
30K → 20M25512+243#16517#16274
20M → 21M19527+168#16274#16106
21M → 35K2273+224#16106#15882
35K → 23M2736+267#15882#15615
23M → 24M2405+235#15615#15380
24M → 40K1853+182#15380#15198
40K → 25.2M892+87#15198#15111
25.2M → Finish13627+109#15111#15002
TOTALS28311203+1628
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing