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BOSTON MARATHON 2025

Yilun Zheng

Bib: 15841•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 47%
Gender (Female)
#0 / 12228
Top 32%
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
23:39
Rank: #13233
Start → 5K
23:39 | 7:37/mi
10K· 6.21 mi
47:34
Rank: #13555 (-322)
5K → 10K
23:55 | 7:42/mi
15K· 9.32 mi
1:11:47
Rank: #13756 (-201)
10K → 15K
24:13 | 7:48/mi
20K· 12.43 mi
1:36:34
Rank: #14003 (-247)
15K → 20K
24:47 | 7:59/mi
Half· 13.11 mi
1:42:00
Rank: #14089 (-86)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:01:19
Rank: #13969 (+120)
Half → 25K
19:19 | 7:58/mi
30K· 18.64 mi
2:27:29
Rank: #13976 (-7)
25K → 30K
26:10 | 8:25/mi
20M
2:38:42
Rank: #13784 (+192)
30K → 20M
11:13 | 8:15/mi
21M
2:47:32
Rank: #13680 (+104)
20M → 21M
8:50 | 8:50/mi
35K· 21.75 mi
2:53:32
Rank: #13622 (+58)
21M → 35K
6:00 | 8:01/mi
23M
3:03:50
Rank: #13448 (+174)
35K → 23M
10:18 | 8:14/mi
24M
3:12:10
Rank: #13446 (+2)
23M → 24M
8:20 | 8:20/mi
40K· 24.85 mi
3:19:18
Rank: #13395 (+51)
24M → 40K
7:08 | 8:21/mi
25.2M
3:22:26
Rank: #13371 (+24)
40K → 25.2M
3:08 | 9:05/mi
Finish· 26.22 mi
3:30:26
Rank: #13322 (+49)
25.2M → Finish
8:00 | 7:51/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:00
Pace7:47 /mi
2nd Half
Distance13.11 mi
Time1:48:26
Pace8:16 /mi
📊Positive Split: 6.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:3223:397:3723:39
7:37
-
10K
6.21 mi11:20:2747:347:3923:55
7:42
+0:05
15K
9.32 mi11:44:401:11:477:4224:13
7:48
+0:06
20K
12.43 mi12:09:271:36:347:4624:47
7:59
+0:11
Half
13.11 mi12:14:531:42:007:475:26
7:58
-0:01
25K
15.53 mi12:34:122:01:197:4919:19
7:58
0:00
30K
18.64 mi13:00:222:27:297:5526:10
8:25
+0:27
20M
20.00 mi13:11:352:38:427:5611:13
8:15
-0:10
21M
21.00 mi13:20:252:47:327:598:50
8:50
+0:35
35K
21.75 mi13:26:252:53:327:596:00
8:01
-0:49
23M
23.00 mi13:36:433:03:508:0010:18
8:14
+0:13
24M
24.00 mi13:45:033:12:108:008:20
8:20
+0:06
40K
24.85 mi13:52:113:19:188:017:08
8:21
+0:01
25.2M
25.20 mi13:55:193:22:268:023:08
9:05
+0:44
Finish
26.22 mi14:03:193:30:268:028:00
7:51
-1:14

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

7:37 /mi

Average Pace

8:02 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:52:18

82% of race

Time at Steady Pace

35:00

17% of race

Time at Slower Pace

3:08

1% of race

Average Pace: 8:02 /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 mi10:56:3223:397:3723:39
7:37
#13233
10K
6.21 mi11:20:2747:347:3923:55
7:42
#13555
15K
9.32 mi11:44:401:11:477:4224:13
7:48
#13756
20K
12.43 mi12:09:271:36:347:4624:47
7:59
#14003
Half
13.11 mi12:14:531:42:007:475:26
7:58
#14089
25K
15.53 mi12:34:122:01:197:4919:19
7:58
#13969
30K
18.64 mi13:00:222:27:297:5526:10
8:25
#13976
20M
20.00 mi13:11:352:38:427:5611:13
8:15
#13784
21M
21.00 mi13:20:252:47:327:598:50
8:50
#13680
35K
21.75 mi13:26:252:53:327:596:00
8:01
#13622
23M
23.00 mi13:36:433:03:508:0010:18
8:14
#13448
24M
24.00 mi13:45:033:12:108:008:20
8:20
#13446
40K
24.85 mi13:52:113:19:188:017:08
8:21
#13395
25.2M
25.20 mi13:55:193:22:268:023:08
9:05
#13371
Finish
26.22 mi14:03:193:30:268:028:00
7:51
#13322
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi132333456345614340(Top 50%)4228(Top 35%)4228(Top 77%)
10K6.21 mi3.10 mi13555-3223678-2223678-22213896(Top 49%)3897(Top 32%)3897(Top 71%)
15K9.32 mi3.11 mi13756-2013828-1503828-15014340(Top 50%)4228(Top 35%)4228(Top 77%)
20K12.43 mi3.11 mi14003-2474003-1754003-17514760(Top 52%)4511(Top 37%)4511(Top 82%)
Half13.11 mi0.68 mi14089-864056-534056-5315621(Top 55%)4941(Top 40%)4941(Top 90%)
25K15.53 mi2.42 mi13969+1204025+314025+3113638(Top 48%)4024(Top 33%)4024(Top 74%)
30K18.64 mi3.11 mi13976-74090-654090-6514277(Top 50%)4519(Top 37%)4519(Top 83%)
20M20.00 mi1.36 mi13784+1924017+734017+7312201(Top 43%)3551(Top 29%)3551(Top 65%)
21M21.00 mi1.00 mi13680+1043992+253992+2512541(Top 44%)3888(Top 32%)3888(Top 71%)
35K21.75 mi0.75 mi13622+583982+103982+1012433(Top 44%)3868(Top 32%)3868(Top 71%)
23M23.00 mi1.25 mi13448+1743929+533929+5311560(Top 41%)3515(Top 29%)3515(Top 64%)
24M24.00 mi1.00 mi13446+23948-193948-1913492(Top 48%)4558(Top 37%)4558(Top 83%)
40K24.85 mi0.85 mi13395+513940+83940+812446(Top 44%)4155(Top 34%)4155(Top 76%)
25.2M25.20 mi0.35 mi13371+243940394012345(Top 43%)4144(Top 34%)4144(Top 76%)
Finish26.22 mi1.02 mi13322+493933+73933+711847(Top 42%)3855(Top 32%)3855(Top 70%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 50%
×21stories
+97ft-345ft

Overall

14340

Females

4228

F18-39

4228

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

13896

Females

3897

F18-39

3897

10K→15K

6.2 - 9.3 mi

Top 50%
×3stories
+67ft-78ft

Overall

14340

Females

4228

F18-39

4228

15K→20K

9.3 - 12.4 mi

Top 52%
×5stories
+106ft-86ft

Overall

14760

Females

4511

F18-39

4511

20K→Half

12.4 - 13.1 mi

Top 55%
×2stories
+19ft-37ft

Overall

15621

Females

4941

F18-39

4941

Half→25K

13.1 - 15.5 mi

Top 48%
×4stories
+66ft-88ft

Overall

13638

Females

4024

F18-39

4024

25K→30K

15.5 - 18.6 mi

Top 50%
×9stories
+181ft-148ft

Overall

14277

Females

4519

F18-39

4519

30K→20M

18.6 - 20.0 mi

Top 43%
×5stories
+64ft-50ft

Overall

12201

Females

3551

F18-39

3551

20M→21M

20.0 - 21.0 mi

Top 44%
×8stories
+106ft-24ft

Overall

12541

Females

3888

F18-39

3888

21M→35K

21.0 - 21.8 mi

Top 44%
×7stories
+17ft-86ft

Overall

12433

Females

3868

F18-39

3868

35K→23M

21.8 - 23.0 mi

Top 41%
×5stories
+23ft-63ft

Overall

11560

Females

3515

F18-39

3515

23M→24M

23.0 - 24.0 mi

Top 48%
×6stories
+12ft-82ft

Overall

13492

Females

4558

F18-39

4558

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12446

Females

4155

F18-39

4155

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

12345

Females

4144

F18-39

4144

25.2M→Finish

25.2 - 26.2 mi

Top 42%
×2stories
+22ft-21ft

Overall

11847

Females

3855

F18-39

3855

Passing Analysis

Category:
Athletes Passed
1903
Passed By
1992
Net Change
-89
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13233
5K → 10K168490-322#13233#13555
10K → 15K141342-201#13555#13756
15K → 20K148395-247#13756#14003
20K → Half1197-86#14003#14089
Half → 25K220100+120#14089#13969
25K → 30K246253-7#13969#13976
30K → 20M22432+192#13976#13784
20M → 21M15147+104#13784#13680
21M → 35K8426+58#13680#13622
35K → 23M19622+174#13622#13448
23M → 24M8684+2#13448#13446
24M → 40K9342+51#13446#13395
40K → 25.2M5026+24#13395#13371
25.2M → Finish8536+49#13371#13322
TOTALS19031992-89
📊

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