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BOSTON MARATHON 2025

Silvia Chen

Bib: 29654•F

CA

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
31:07
Rank: #25604
Start → 5K
10:01/mi
31:07 split
10K· 6.21 mi
1:01:59
Rank: #25368 (+236)
5K → 10K
9:56/mi
30:52 split
15K· 9.32 mi
1:33:24
Rank: #25338 (+30)
10K → 15K
10:07/mi
31:25 split
20K· 12.43 mi
2:06:27
Rank: #25382 (-44)
15K → 20K
10:38/mi
33:03 split
Half· 13.11 mi
2:13:10
Rank: #25332 (+50)
20K → Half
9:51/mi
6:43 split
25K· 15.53 mi
2:39:10
Rank: #25216 (+116)
Half → 25K
10:43/mi
26:00 split
30K· 18.64 mi
3:14:35
Rank: #25109 (+107)
25K → 30K
11:24/mi
35:25 split
20M
3:30:16
Rank: #25083 (+26)
30K → 20M
11:32/mi
15:41 split
21M
3:43:06
Rank: #25085 (-2)
20M → 21M
12:50/mi
12:50 split
35K· 21.75 mi
3:51:03
Rank: #25057 (+28)
21M → 35K
10:38/mi
7:57 split
23M
4:05:53
Rank: #25062 (-5)
35K → 23M
11:51/mi
14:50 split
24M
4:16:58
Rank: #25025 (+37)
23M → 24M
11:05/mi
11:05 split
40K· 24.85 mi
4:26:46
Rank: #24983 (+42)
24M → 40K
11:28/mi
9:48 split
25.2M
4:31:22
Rank: #25005 (-22)
40K → 25.2M
13:20/mi
4:36 split
Finish· 26.22 mi
4:41:42
Rank: #24969 (+36)
25.2M → Finish
10:08/mi
10:20 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:13:10
Pace10:09 /mi
2nd Half
Distance13.11 mi
Time2:28:32
Pace11:20 /mi
📊Positive Split: 11.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:4831:0710:0131:07
10:01
-
10K
6.21 mi12:22:401:01:599:5930:52
9:56
-0:05
15K
9.32 mi12:54:051:33:2410:0131:25
10:07
+0:11
20K
12.43 mi13:27:082:06:2710:1133:03
10:38
+0:31
Half
13.11 mi13:33:512:13:1010:096:43
9:51
-0:47
25K
15.53 mi13:59:512:39:1010:1526:00
10:43
+0:52
30K
18.64 mi14:35:163:14:3510:2635:25
11:24
+0:41
20M
20.00 mi14:50:573:30:1610:3115:41
11:32
+0:08
21M
21.00 mi15:03:473:43:0610:3712:50
12:50
+1:18
35K
21.75 mi15:11:443:51:0310:377:57
10:38
-2:12
23M
23.00 mi15:26:344:05:5310:4114:50
11:51
+1:13
24M
24.00 mi15:37:394:16:5810:4211:05
11:05
-0:46
40K
24.85 mi15:47:274:26:4610:449:48
11:28
+0:23
25.2M
25.20 mi15:52:034:31:2210:464:36
13:20
+1:52
Finish
26.22 mi16:02:234:41:4210:4510:20
10:08
-3:12

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

9:51 /mi

Average Pace

10:45 /mi

Slowest Pace

13:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:27

39% of race

Time at Steady Pace

1:18:05

28% of race

Time at Slower Pace

1:33:10

33% of race

Average Pace: 10:45 /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 mi11:51:4831:0710:0131:07
10:01
#25604
10K
6.21 mi12:22:401:01:599:5930:52
9:56
#25368
15K
9.32 mi12:54:051:33:2410:0131:25
10:07
#25338
20K
12.43 mi13:27:082:06:2710:1133:03
10:38
#25382
Half
13.11 mi13:33:512:13:1010:096:43
9:51
#25332
25K
15.53 mi13:59:512:39:1010:1526:00
10:43
#25216
30K
18.64 mi14:35:163:14:3510:2635:25
11:24
#25109
20M
20.00 mi14:50:573:30:1610:3115:41
11:32
#25083
21M
21.00 mi15:03:473:43:0610:3712:50
12:50
#25085
35K
21.75 mi15:11:443:51:0310:377:57
10:38
#25057
23M
23.00 mi15:26:344:05:5310:4114:50
11:51
#25062
24M
24.00 mi15:37:394:16:5810:4211:05
11:05
#25025
40K
24.85 mi15:47:274:26:4610:449:48
11:28
#24983
25.2M
25.20 mi15:52:034:31:2210:464:36
13:20
#25005
Finish
26.22 mi16:02:234:41:4210:4510:20
10:08
#24969
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25604105381053825221(Top 89%)10352(Top 85%)10352(Top 189%)
10K6.21 mi3.10 mi25368+23610434+10410434+10425168(Top 89%)10323(Top 84%)10323(Top 189%)
15K9.32 mi3.11 mi25338+3010410+2410410+2425221(Top 89%)10352(Top 85%)10352(Top 189%)
20K12.43 mi3.11 mi25382-4410451-4110451-4125422(Top 90%)10488(Top 86%)10488(Top 192%)
Half13.11 mi0.68 mi25332+5010425+2610425+2624461(Top 86%)9982(Top 82%)9982(Top 183%)
25K15.53 mi2.42 mi25216+11610371+5410371+5424750(Top 87%)10154(Top 83%)10154(Top 186%)
30K18.64 mi3.11 mi25109+10710342+2910342+2924694(Top 87%)10234(Top 84%)10234(Top 187%)
20M20.00 mi1.36 mi25083+2610335+710335+724590(Top 87%)10265(Top 84%)10265(Top 188%)
21M21.00 mi1.00 mi25085-210350-1510350-1524826(Top 87%)10474(Top 86%)10474(Top 192%)
35K21.75 mi0.75 mi25057+2810348+210348+223410(Top 82%)9762(Top 80%)9762(Top 178%)
23M23.00 mi1.25 mi25062-510367-1910367-1924840(Top 87%)10515(Top 86%)10515(Top 192%)
24M24.00 mi1.00 mi25025+3710355+1210355+1224145(Top 85%)10194(Top 83%)10194(Top 186%)
40K24.85 mi0.85 mi24983+4210342+1310342+1324048(Top 85%)10192(Top 83%)10192(Top 186%)
25.2M25.20 mi0.35 mi25005-2210360-1810360-1825434(Top 90%)10905(Top 89%)10905(Top 199%)
Finish26.22 mi1.02 mi24969+3610343+1710343+1723322(Top 82%)9836(Top 80%)9836(Top 180%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 89%
×21story building
+97ft-345ft

Overall

25221

Females

10352

F18-39

10352

5K→10K

3.1 - 6.2 mi

Top 89%
×5story building
+79ft-138ft

Overall

25168

Females

10323

F18-39

10323

10K→15K

6.2 - 9.3 mi

Top 89%
×3story building
+67ft-78ft

Overall

25221

Females

10352

F18-39

10352

15K→20K

9.3 - 12.4 mi

Top 90%
×5story building
+106ft-86ft

Overall

25422

Females

10488

F18-39

10488

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

24461

Females

9982

F18-39

9982

Half→25K

13.1 - 15.5 mi

Top 87%
×4story building
+66ft-88ft

Overall

24750

Females

10154

F18-39

10154

25K→30K

15.5 - 18.6 mi

Top 87%
×9story building
+181ft-148ft

Overall

24694

Females

10234

F18-39

10234

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

24590

Females

10265

F18-39

10265

20M→21M

20.0 - 21.0 mi

Top 87%
×8story building
+106ft-24ft

Overall

24826

Females

10474

F18-39

10474

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23410

Females

9762

F18-39

9762

35K→23M

21.8 - 23.0 mi

Top 87%
×5story building
+23ft-63ft

Overall

24840

Females

10515

F18-39

10515

23M→24M

23.0 - 24.0 mi

Top 85%
×6story building
+12ft-82ft

Overall

24145

Females

10194

F18-39

10194

24M→40K

24.0 - 24.9 mi

Top 85%
×1story
+6ft-20ft

Overall

24048

Females

10192

F18-39

10192

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

25434

Females

10905

F18-39

10905

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

23322

Females

9836

F18-39

9836

Passing Analysis

Category:
Athletes Passed
1335
Passed By
700
Net Change
+635
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25604
5K → 10K32387+236#25604#25368
10K → 15K154124+30#25368#25338
15K → 20K102146-44#25338#25382
20K → Half544+50#25382#25332
Half → 25K16044+116#25332#25216
25K → 30K18073+107#25216#25109
30K → 20M6943+26#25109#25083
20M → 21M5254-2#25083#25085
21M → 35K4113+28#25085#25057
35K → 23M3944-5#25057#25062
23M → 24M4912+37#25062#25025
24M → 40K5816+42#25025#24983
40K → 25.2M628-22#24983#25005
25.2M → Finish4812+36#25005#24969
TOTALS1335700+635
📊

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