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BOSTON MARATHON 2025

Katherine Zhang

Bib: 31571•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:46
Rank: #20543
Start → 5K
8:37/mi
26:46 split
10K· 6.21 mi
52:47
Rank: #19810 (+733)
5K → 10K
8:22/mi
26:01 split
15K· 9.32 mi
1:18:29
Rank: #19157 (+653)
10K → 15K
8:16/mi
25:42 split
20K· 12.43 mi
1:46:32
Rank: #19725 (-568)
15K → 20K
9:02/mi
28:03 split
Half· 13.11 mi
1:52:13
Rank: #19637 (+88)
20K → Half
8:20/mi
5:41 split
25K· 15.53 mi
2:13:23
Rank: #19432 (+205)
Half → 25K
8:44/mi
21:10 split
30K· 18.64 mi
2:41:44
Rank: #19210 (+222)
25K → 30K
9:07/mi
28:21 split
20M
2:53:52
Rank: #18997 (+213)
30K → 20M
8:56/mi
12:08 split
21M
3:03:33
Rank: #18848 (+149)
20M → 21M
9:41/mi
9:41 split
35K· 21.75 mi
3:10:14
Rank: #18818 (+30)
21M → 35K
8:56/mi
6:41 split
23M
3:21:23
Rank: #18621 (+197)
35K → 23M
8:54/mi
11:09 split
24M
3:30:10
Rank: #18510 (+111)
23M → 24M
8:47/mi
8:47 split
40K· 24.85 mi
3:38:46
Rank: #18629 (-119)
24M → 40K
10:04/mi
8:36 split
25.2M
3:42:19
Rank: #18616 (+13)
40K → 25.2M
10:18/mi
3:33 split
Finish· 26.22 mi
3:50:41
Rank: #18469 (+147)
25.2M → Finish
8:13/mi
8:22 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:13
Pace8:34 /mi
2nd Half
Distance13.11 mi
Time1:58:28
Pace9:02 /mi
📊Positive Split: 5.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:1226:468:3726:46
8:37
-
10K
6.21 mi12:14:1352:478:3026:01
8:22
-0:15
15K
9.32 mi12:39:551:18:298:2525:42
8:16
-0:06
20K
12.43 mi13:07:581:46:328:3428:03
9:02
+0:46
Half
13.11 mi13:13:391:52:138:345:41
8:20
-0:42
25K
15.53 mi13:34:492:13:238:3521:10
8:44
+0:24
30K
18.64 mi14:03:102:41:448:4128:21
9:07
+0:23
20M
20.00 mi14:15:182:53:528:4212:08
8:56
-0:11
21M
21.00 mi14:24:593:03:338:449:41
9:41
+0:45
35K
21.75 mi14:31:403:10:148:456:41
8:56
-0:45
23M
23.00 mi14:42:493:21:238:4511:09
8:54
-0:02
24M
24.00 mi14:51:363:30:108:458:47
8:47
-0:07
40K
24.85 mi15:00:123:38:468:488:36
10:04
+1:17
25.2M
25.20 mi15:03:453:42:198:493:33
10:18
+0:14
Finish
26.22 mi15:12:073:50:418:488:22
8:13
-2:05

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

8:13 /mi

Average Pace

8:48 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:05:46

29% of race

Time at Steady Pace

2:23:05

62% of race

Time at Slower Pace

21:50

9% of race

Average Pace: 8:48 /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 mi11:48:1226:468:3726:46
8:37
#20543
10K
6.21 mi12:14:1352:478:3026:01
8:22
#19810
15K
9.32 mi12:39:551:18:298:2525:42
8:16
#19157
20K
12.43 mi13:07:581:46:328:3428:03
9:02
#19725
Half
13.11 mi13:13:391:52:138:345:41
8:20
#19637
25K
15.53 mi13:34:492:13:238:3521:10
8:44
#19432
30K
18.64 mi14:03:102:41:448:4128:21
9:07
#19210
20M
20.00 mi14:15:182:53:528:4212:08
8:56
#18997
21M
21.00 mi14:24:593:03:338:449:41
9:41
#18848
35K
21.75 mi14:31:403:10:148:456:41
8:56
#18818
23M
23.00 mi14:42:493:21:238:4511:09
8:54
#18621
24M
24.00 mi14:51:363:30:108:458:47
8:47
#18510
40K
24.85 mi15:00:123:38:468:488:36
10:04
#18629
25.2M
25.20 mi15:03:453:42:198:493:33
10:18
#18616
Finish
26.22 mi15:12:073:50:418:488:22
8:13
#18469
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi205437831783117871(Top 63%)6244(Top 51%)6244(Top 114%)
10K6.21 mi3.10 mi19810+7337362+4697362+46919045(Top 67%)6911(Top 57%)6911(Top 126%)
15K9.32 mi3.11 mi19157+6536990+3726990+37217871(Top 63%)6244(Top 51%)6244(Top 114%)
20K12.43 mi3.11 mi19725-5687317-3277317-32721127(Top 74%)8123(Top 66%)8123(Top 149%)
Half13.11 mi0.68 mi19637+887268+497268+4918197(Top 64%)6447(Top 53%)6447(Top 118%)
25K15.53 mi2.42 mi19432+2057163+1057163+10518587(Top 65%)6748(Top 55%)6748(Top 123%)
30K18.64 mi3.11 mi19210+2227080+837080+8318296(Top 64%)6741(Top 55%)6741(Top 123%)
20M20.00 mi1.36 mi18997+2136978+1026978+10216438(Top 58%)5851(Top 48%)5851(Top 107%)
21M21.00 mi1.00 mi18848+1496916+626916+6216980(Top 60%)6251(Top 51%)6251(Top 114%)
35K21.75 mi0.75 mi18818+306917-16917-117944(Top 63%)6870(Top 56%)6870(Top 126%)
23M23.00 mi1.25 mi18621+1976833+846833+8415738(Top 55%)5747(Top 47%)5747(Top 105%)
24M24.00 mi1.00 mi18510+1116798+356798+3516262(Top 57%)6088(Top 50%)6088(Top 111%)
40K24.85 mi0.85 mi18629-1196895-976895-9720652(Top 73%)8478(Top 69%)8478(Top 155%)
25.2M25.20 mi0.35 mi18616+136900-56900-518302(Top 64%)7290(Top 60%)7290(Top 133%)
Finish26.22 mi1.02 mi18469+1476837+636837+6314388(Top 51%)5161(Top 42%)5161(Top 94%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17871

Females

6244

F18-39

6244

5K→10K

3.1 - 6.2 mi

Top 67%
×5story building
+79ft-138ft

Overall

19045

Females

6911

F18-39

6911

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17871

Females

6244

F18-39

6244

15K→20K

9.3 - 12.4 mi

Top 74%
×5story building
+106ft-86ft

Overall

21127

Females

8123

F18-39

8123

20K→Half

12.4 - 13.1 mi

Top 64%
×2story building
+19ft-37ft

Overall

18197

Females

6447

F18-39

6447

Half→25K

13.1 - 15.5 mi

Top 65%
×4story building
+66ft-88ft

Overall

18587

Females

6748

F18-39

6748

25K→30K

15.5 - 18.6 mi

Top 64%
×9story building
+181ft-148ft

Overall

18296

Females

6741

F18-39

6741

30K→20M

18.6 - 20.0 mi

Top 58%
×5story building
+64ft-50ft

Overall

16438

Females

5851

F18-39

5851

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

16980

Females

6251

F18-39

6251

21M→35K

21.0 - 21.8 mi

Top 63%
×7story building
+17ft-86ft

Overall

17944

Females

6870

F18-39

6870

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

15738

Females

5747

F18-39

5747

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

16262

Females

6088

F18-39

6088

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

20652

Females

8478

F18-39

8478

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

18302

Females

7290

F18-39

7290

25.2M→Finish

25.2 - 26.2 mi

Top 51%
×2story building
+22ft-21ft

Overall

14388

Females

5161

F18-39

5161

Passing Analysis

Category:
Athletes Passed
3308
Passed By
1234
Net Change
+2074
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20543
5K → 10K81279+733#20543#19810
10K → 15K67219+653#19810#19157
15K → 20K65633-568#19157#19725
20K → Half946+88#19725#19637
Half → 25K27065+205#19637#19432
25K → 30K329107+222#19432#19210
30K → 20M23118+213#19210#18997
20M → 21M18334+149#18997#18848
21M → 35K6737+30#18848#18818
35K → 23M21316+197#18818#18621
23M → 24M13221+111#18621#18510
24M → 40K47166-119#18510#18629
40K → 25.2M3320+13#18629#18616
25.2M → Finish16013+147#18616#18469
TOTALS33081234+2074
📊

Passing Visuals

Category:
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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