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BOSTON MARATHON 2025

Alicia Chen

Bib: 31946•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

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:16/mi
25:42
↑ 97↓ 3451.5%
10K· 6.21 mi
8:13/mi
51:15
↑ 79↓ 1380.4%
15K· 9.32 mi
8:11/mi
1:16:40
↑ 67↓ 78
20K· 12.43 mi
8:34/mi
1:43:17
↑ 106↓ 860.1%
Half· 13.11 mi
8:21/mi
1:48:59
↑ 19↓ 370.5%
25K· 15.53 mi
8:52/mi
2:10:30
↑ 66↓ 880.2%
30K· 18.64 mi
9:07/mi
2:38:50
↑ 181↓ 1480.2%
20M
9:13/mi
2:51:22
↑ 64↓ 500.2%
21M
9:37/mi
3:00:59
↑ 106↓ 241.6%
35K· 21.75 mi
8:21/mi
3:07:14
↑ 17↓ 861.7%
23M
8:57/mi
3:18:26
↑ 23↓ 630.6%
24M
8:36/mi
3:27:02
↓ 821.3%
40K· 24.85 mi
8:47/mi
3:34:33
↓ 200.3%
25.2M
9:37/mi
3:37:52
↑ 13↓ 160.2%
Finish· 26.22 mi
8:28/mi
3:46:30
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:59
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:57:31
Pace8:58 /mi
📊Positive Split: 7.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:4225:428:1625:42
8:16
-
10K
6.21 mi12:15:1551:158:1525:33
8:13
-0:03
15K
9.32 mi12:40:401:16:408:1425:25
8:11
-0:02
20K
12.43 mi13:07:171:43:178:1926:37
8:34
+0:23
Half
13.11 mi13:12:591:48:598:195:42
8:21
-0:13
25K
15.53 mi13:34:302:10:308:2421:31
8:52
+0:31
30K
18.64 mi14:02:502:38:508:3128:20
9:07
+0:15
20M
20.00 mi14:15:222:51:228:3412:32
9:13
+0:06
21M
21.00 mi14:24:593:00:598:379:37
9:37
+0:24
35K
21.75 mi14:31:143:07:148:376:15
8:21
-1:16
23M
23.00 mi14:42:263:18:268:3811:12
8:57
+0:36
24M
24.00 mi14:51:023:27:028:388:36
8:36
-0:21
40K
24.85 mi14:58:333:34:338:387:31
8:47
+0:11
25.2M
25.20 mi15:01:523:37:528:393:19
9:37
+0:50
Finish
26.22 mi15:10:303:46:308:398:38
8:28
-1:09

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

8:11 /mi

Average Pace

8:39 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:52:42

76% of race

Time at Steady Pace

53:48

24% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:38 /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 mi11:49:4225:428:1625:42
8:16
#18549
10K
6.21 mi12:15:1551:158:1525:33
8:13
#18288
15K
9.32 mi12:40:401:16:408:1425:25
8:11
#17929
20K
12.43 mi13:07:171:43:178:1926:37
8:34
#18065
Half
13.11 mi13:12:591:48:598:195:42
8:21
#18058
25K
15.53 mi13:34:302:10:308:2421:31
8:52
#18265
30K
18.64 mi14:02:502:38:508:3128:20
9:07
#18269
20M
20.00 mi14:15:222:51:228:3412:32
9:13
#18212
21M
21.00 mi14:24:593:00:598:379:37
9:37
#18124
35K
21.75 mi14:31:143:07:148:376:15
8:21
#17988
23M
23.00 mi14:42:263:18:268:3811:12
8:57
#17844
24M
24.00 mi14:51:023:27:028:388:36
8:36
#17692
40K
24.85 mi14:58:333:34:338:387:31
8:47
#17592
25.2M
25.20 mi15:01:523:37:528:393:19
9:37
#17547
Finish
26.22 mi15:10:303:46:308:398:38
8:28
#17492
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi185496657665717289(Top 61%)5897(Top 48%)5897(Top 108%)
10K6.21 mi3.10 mi18288+2616498+1596498+15918074(Top 64%)6343(Top 52%)6343(Top 116%)
15K9.32 mi3.11 mi17929+3596283+2156283+21517289(Top 61%)5897(Top 48%)5897(Top 108%)
20K12.43 mi3.11 mi18065-1366371-886371-8818650(Top 66%)6716(Top 55%)6716(Top 123%)
Half13.11 mi0.68 mi18058+76373-26373-218341(Top 65%)6518(Top 53%)6518(Top 119%)
25K15.53 mi2.42 mi18265-2076507-1346507-13419304(Top 68%)7141(Top 58%)7141(Top 131%)
30K18.64 mi3.11 mi18269-46543-366543-3618267(Top 64%)6725(Top 55%)6725(Top 123%)
20M20.00 mi1.36 mi18212+576535+86535+817900(Top 63%)6649(Top 54%)6649(Top 122%)
21M21.00 mi1.00 mi18124+886506+296506+2916654(Top 59%)6064(Top 50%)6064(Top 111%)
35K21.75 mi0.75 mi17988+1366440+666440+6614665(Top 52%)5068(Top 41%)5068(Top 93%)
23M23.00 mi1.25 mi17844+1446408+326408+3215974(Top 56%)5874(Top 48%)5874(Top 107%)
24M24.00 mi1.00 mi17692+1526357+516357+5115201(Top 54%)5499(Top 45%)5499(Top 101%)
40K24.85 mi0.85 mi17592+1006330+276330+2715177(Top 53%)5621(Top 46%)5621(Top 103%)
25.2M25.20 mi0.35 mi17547+456317+136317+1315263(Top 54%)5704(Top 47%)5704(Top 104%)
Finish26.22 mi1.02 mi17492+556310+76310+716066(Top 57%)6061(Top 50%)6061(Top 111%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21story building
+97ft-345ft

Overall

17289

Females

5897

F18-39

5897

5K→10K

3.1 - 6.2 mi

Top 64%
×5story building
+79ft-138ft

Overall

18074

Females

6343

F18-39

6343

10K→15K

6.2 - 9.3 mi

Top 61%
×3story building
+67ft-78ft

Overall

17289

Females

5897

F18-39

5897

15K→20K

9.3 - 12.4 mi

Top 66%
×5story building
+106ft-86ft

Overall

18650

Females

6716

F18-39

6716

20K→Half

12.4 - 13.1 mi

Top 65%
×2story building
+19ft-37ft

Overall

18341

Females

6518

F18-39

6518

Half→25K

13.1 - 15.5 mi

Top 68%
×4story building
+66ft-88ft

Overall

19304

Females

7141

F18-39

7141

25K→30K

15.5 - 18.6 mi

Top 64%
×9story building
+181ft-148ft

Overall

18267

Females

6725

F18-39

6725

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

17900

Females

6649

F18-39

6649

20M→21M

20.0 - 21.0 mi

Top 59%
×8story building
+106ft-24ft

Overall

16654

Females

6064

F18-39

6064

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

14665

Females

5068

F18-39

5068

35K→23M

21.8 - 23.0 mi

Top 56%
×5story building
+23ft-63ft

Overall

15974

Females

5874

F18-39

5874

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15201

Females

5499

F18-39

5499

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15177

Females

5621

F18-39

5621

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15263

Females

5704

F18-39

5704

25.2M→Finish

25.2 - 26.2 mi

Top 57%
×2story building
+22ft-21ft

Overall

16066

Females

6061

F18-39

6061

Passing Analysis

Category:
Athletes Passed
2395
Passed By
1338
Net Change
+1057
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18549
5K → 10K409148+261#18549#18288
10K → 15K40445+359#18288#17929
15K → 20K147283-136#17929#18065
20K → Half4134+7#18065#18058
Half → 25K105312-207#18058#18265
25K → 30K243247-4#18265#18269
30K → 20M14992+57#18269#18212
20M → 21M14961+88#18212#18124
21M → 35K1448+136#18124#17988
35K → 23M17632+144#17988#17844
23M → 24M16917+152#17844#17692
24M → 40K12121+100#17692#17592
40K → 25.2M505+45#17592#17547
25.2M → Finish8833+55#17547#17492
TOTALS23951338+1057
📊

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