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BOSTON MARATHON 2025

Cong Chen

Bib: 17658•F

NJ

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0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 45%
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:27
Rank: #18058
Start → 5K
25:27 | 8:11/mi
10K· 6.21 mi
52:23
Rank: #19424 (-1366)
5K → 10K
26:56 | 8:40/mi
15K· 9.32 mi
1:19:04
Rank: #19559 (-135)
10K → 15K
26:41 | 8:35/mi
20K· 12.43 mi
1:45:41
Rank: #19292 (+267)
15K → 20K
26:37 | 8:34/mi
Half· 13.11 mi
1:51:19
Rank: #19211 (+81)
20K → Half
5:38 | 8:15/mi
25K· 15.53 mi
2:13:15
Rank: #19385 (-174)
Half → 25K
21:56 | 9:03/mi
30K· 18.64 mi
2:41:29
Rank: #19118 (+267)
25K → 30K
28:14 | 9:05/mi
20M
2:53:51
Rank: #18994 (+124)
30K → 20M
12:22 | 9:06/mi
21M
3:03:11
Rank: #18751 (+243)
20M → 21M
9:20 | 9:20/mi
35K· 21.75 mi
3:09:44
Rank: #18679 (+72)
21M → 35K
6:33 | 8:45/mi
23M
3:21:29
Rank: #18641 (+38)
35K → 23M
11:45 | 9:23/mi
24M
3:30:07
Rank: #18495 (+146)
23M → 24M
8:38 | 8:38/mi
40K· 24.85 mi
3:37:33
Rank: #18340 (+155)
24M → 40K
7:26 | 8:42/mi
25.2M
3:40:47
Rank: #18266 (+74)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:49:01
Rank: #18087 (+179)
25.2M → Finish
8:14 | 8:05/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:19
Pace8:29 /mi
2nd Half
Distance13.11 mi
Time1:57:42
Pace8:59 /mi
📊Positive Split: 5.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:0425:278:1125:27
8:11
-
10K
6.21 mi11:43:0052:238:2626:56
8:40
+0:29
15K
9.32 mi12:09:411:19:048:2926:41
8:35
-0:05
20K
12.43 mi12:36:181:45:418:3026:37
8:34
-0:01
Half
13.11 mi12:41:561:51:198:295:38
8:15
-0:19
25K
15.53 mi13:03:522:13:158:3521:56
9:03
+0:48
30K
18.64 mi13:32:062:41:298:4028:14
9:05
+0:02
20M
20.00 mi13:44:282:53:518:4212:22
9:06
+0:01
21M
21.00 mi13:53:483:03:118:439:20
9:20
+0:14
35K
21.75 mi14:00:213:09:448:436:33
8:45
-0:35
23M
23.00 mi14:12:063:21:298:4611:45
9:23
+0:38
24M
24.00 mi14:20:443:30:078:458:38
8:38
-0:45
40K
24.85 mi14:28:103:37:338:457:26
8:42
+0:04
25.2M
25.20 mi14:31:243:40:478:463:14
9:23
+0:41
Finish
26.22 mi14:39:383:49:018:448:14
8:05
-1:18

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

8:05 /mi

Average Pace

8:44 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:22:10

62% of race

Time at Steady Pace

1:26:51

38% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:44 /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 mi11:16:0425:278:1125:27
8:11
#18058
10K
6.21 mi11:43:0052:238:2626:56
8:40
#19424
15K
9.32 mi12:09:411:19:048:2926:41
8:35
#19559
20K
12.43 mi12:36:181:45:418:3026:37
8:34
#19292
Half
13.11 mi12:41:561:51:198:295:38
8:15
#19211
25K
15.53 mi13:03:522:13:158:3521:56
9:03
#19385
30K
18.64 mi13:32:062:41:298:4028:14
9:05
#19118
20M
20.00 mi13:44:282:53:518:4212:22
9:06
#18994
21M
21.00 mi13:53:483:03:118:439:20
9:20
#18751
35K
21.75 mi14:00:213:09:448:436:33
8:45
#18679
23M
23.00 mi14:12:063:21:298:4611:45
9:23
#18641
24M
24.00 mi14:20:443:30:078:458:38
8:38
#18495
40K
24.85 mi14:28:103:37:338:457:26
8:42
#18340
25.2M
25.20 mi14:31:243:40:478:463:14
9:23
#18266
Finish
26.22 mi14:39:383:49:018:448:14
8:05
#18087
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi180586382638219869(Top 70%)7370(Top 60%)7370(Top 407%)
10K6.21 mi3.10 mi19424-13667136-7547136-75420709(Top 73%)7864(Top 64%)7864(Top 434%)
15K9.32 mi3.11 mi19559-1357209-737209-7319869(Top 70%)7370(Top 60%)7370(Top 407%)
20K12.43 mi3.11 mi19292+2677074+1357074+13518654(Top 66%)6720(Top 55%)6720(Top 371%)
Half13.11 mi0.68 mi19211+817032+427032+4217728(Top 62%)6182(Top 51%)6182(Top 341%)
25K15.53 mi2.42 mi19385-1747138-1067138-10620111(Top 71%)7592(Top 62%)7592(Top 419%)
30K18.64 mi3.11 mi19118+2677028+1107028+11018136(Top 64%)6654(Top 54%)6654(Top 367%)
20M20.00 mi1.36 mi18994+1246976+526976+5217333(Top 61%)6330(Top 52%)6330(Top 349%)
21M21.00 mi1.00 mi18751+2436863+1136863+11315349(Top 54%)5379(Top 44%)5379(Top 297%)
35K21.75 mi0.75 mi18679+726836+276836+2717063(Top 60%)6384(Top 52%)6384(Top 352%)
23M23.00 mi1.25 mi18641+386845-96845-918182(Top 64%)7072(Top 58%)7072(Top 390%)
24M24.00 mi1.00 mi18495+1466789+566789+5615386(Top 54%)5597(Top 46%)5597(Top 309%)
40K24.85 mi0.85 mi18340+1556734+556734+5514634(Top 52%)5333(Top 44%)5333(Top 294%)
25.2M25.20 mi0.35 mi18266+746704+306704+3014001(Top 49%)5044(Top 41%)5044(Top 278%)
Finish26.22 mi1.02 mi18087+1796615+896615+8913499(Top 48%)4707(Top 38%)4707(Top 260%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 70%
×21stories
+97ft-345ft

Overall

19869

Females

7370

F45-49

7370

5K→10K

3.1 - 6.2 mi

Top 73%
×5stories
+79ft-138ft

Overall

20709

Females

7864

F45-49

7864

10K→15K

6.2 - 9.3 mi

Top 70%
×3stories
+67ft-78ft

Overall

19869

Females

7370

F45-49

7370

15K→20K

9.3 - 12.4 mi

Top 66%
×5stories
+106ft-86ft

Overall

18654

Females

6720

F45-49

6720

20K→Half

12.4 - 13.1 mi

Top 62%
×2stories
+19ft-37ft

Overall

17728

Females

6182

F45-49

6182

Half→25K

13.1 - 15.5 mi

Top 71%
×4stories
+66ft-88ft

Overall

20111

Females

7592

F45-49

7592

25K→30K

15.5 - 18.6 mi

Top 64%
×9stories
+181ft-148ft

Overall

18136

Females

6654

F45-49

6654

30K→20M

18.6 - 20.0 mi

Top 61%
×5stories
+64ft-50ft

Overall

17333

Females

6330

F45-49

6330

20M→21M

20.0 - 21.0 mi

Top 54%
×8stories
+106ft-24ft

Overall

15349

Females

5379

F45-49

5379

21M→35K

21.0 - 21.8 mi

Top 60%
×7stories
+17ft-86ft

Overall

17063

Females

6384

F45-49

6384

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

18182

Females

7072

F45-49

7072

23M→24M

23.0 - 24.0 mi

Top 54%
×6stories
+12ft-82ft

Overall

15386

Females

5597

F45-49

5597

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

14634

Females

5333

F45-49

5333

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

14001

Females

5044

F45-49

5044

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13499

Females

4707

F45-49

4707

Passing Analysis

Category:
Athletes Passed
2295
Passed By
2324
Net Change
-29
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18058
5K → 10K311397-1366#18058#19424
10K → 15K149284-135#19424#19559
15K → 20K33568+267#19559#19292
20K → Half865+81#19292#19211
Half → 25K116290-174#19211#19385
25K → 30K35992+267#19385#19118
30K → 20M16743+124#19118#18994
20M → 21M25411+243#18994#18751
21M → 35K8715+72#18751#18679
35K → 23M12789+38#18679#18641
23M → 24M15711+146#18641#18495
24M → 40K16510+155#18495#18340
40K → 25.2M773+74#18340#18266
25.2M → Finish1856+179#18266#18087
TOTALS22952324-29
📊

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