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BOSTON MARATHON 2025

Sarah Biron

Bib: 10764•F

MD

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 40%
Gender (Female)
#0 / 12228
Top 24%
Division (F18-39)
#0 / 5469
Top 41%
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
7:13/mi
22:26
↑ 97↓ 3451.5%
10K· 6.21 mi
7:11/mi
44:45
↑ 79↓ 1380.4%
15K· 9.32 mi
7:11/mi
1:07:03
↑ 67↓ 78
20K· 12.43 mi
7:21/mi
1:29:54
↑ 106↓ 860.1%
Half· 13.11 mi
7:27/mi
1:34:59
↑ 19↓ 370.5%
25K· 15.53 mi
7:39/mi
1:53:33
↑ 66↓ 880.2%
30K· 18.64 mi
8:15/mi
2:19:11
↑ 181↓ 1480.2%
20M
8:23/mi
2:30:34
↑ 64↓ 500.2%
21M
9:08/mi
2:39:42
↑ 106↓ 241.6%
35K· 21.75 mi
7:52/mi
2:45:35
↑ 17↓ 861.7%
23M
8:30/mi
2:56:14
↑ 23↓ 630.6%
24M
8:02/mi
3:04:16
↓ 821.3%
40K· 24.85 mi
9:16/mi
3:12:11
↓ 200.3%
25.2M
9:57/mi
3:15:37
↑ 13↓ 160.2%
Finish· 26.22 mi
8:25/mi
3:24:12
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:34:59
Pace7:15 /mi
2nd Half
Distance13.11 mi
Time1:49:13
Pace8:20 /mi
📊Positive Split: 15.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:1622:267:1322:26
7:13
-
10K
6.21 mi11:11:3544:457:1222:19
7:11
-0:02
15K
9.32 mi11:33:531:07:037:1222:18
7:11
0:00
20K
12.43 mi11:56:441:29:547:1422:51
7:21
+0:10
Half
13.11 mi12:01:491:34:597:155:05
7:27
+0:06
25K
15.53 mi12:20:231:53:337:1918:34
7:39
+0:12
30K
18.64 mi12:46:012:19:117:2825:38
8:15
+0:36
20M
20.00 mi12:57:242:30:347:3211:23
8:23
+0:08
21M
21.00 mi13:06:322:39:427:369:08
9:08
+0:45
35K
21.75 mi13:12:252:45:357:375:53
7:52
-1:16
23M
23.00 mi13:23:042:56:147:4010:39
8:30
+0:38
24M
24.00 mi13:31:063:04:167:418:02
8:02
-0:28
40K
24.85 mi13:39:013:12:117:447:55
9:16
+1:14
25.2M
25.20 mi13:42:273:15:377:463:26
9:57
+0:41
Finish
26.22 mi13:51:023:24:127:488:35
8:25
-1:32

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

7:11 /mi

Average Pace

7:48 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:34:59

47% of race

Time at Steady Pace

1:18:05

38% of race

Time at Slower Pace

31:08

15% of race

Average Pace: 7:47 /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 mi10:49:1622:267:1322:26
7:13
#9657
10K
6.21 mi11:11:3544:457:1222:19
7:11
#9481
15K
9.32 mi11:33:531:07:037:1222:18
7:11
#9286
20K
12.43 mi11:56:441:29:547:1422:51
7:21
#9296
Half
13.11 mi12:01:491:34:597:155:05
7:27
#9376
25K
15.53 mi12:20:231:53:337:1918:34
7:39
#9661
30K
18.64 mi12:46:012:19:117:2825:38
8:15
#10283
20M
20.00 mi12:57:242:30:347:3211:23
8:23
#10506
21M
21.00 mi13:06:322:39:427:369:08
9:08
#10710
35K
21.75 mi13:12:252:45:357:375:53
7:52
#10714
23M
23.00 mi13:23:042:56:147:4010:39
8:30
#10840
24M
24.00 mi13:31:063:04:167:418:02
8:02
#10841
40K
24.85 mi13:39:013:12:117:447:55
9:16
#11121
25.2M
25.20 mi13:42:273:15:377:463:26
9:57
#11218
Finish
26.22 mi13:51:023:24:127:488:35
8:25
#11411
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9657165616568954(Top 32%)1413(Top 12%)1413(Top 26%)
10K6.21 mi3.10 mi9481+1761570+861570+869362(Top 33%)1542(Top 13%)1542(Top 28%)
15K9.32 mi3.11 mi9286+1951516+541516+548954(Top 32%)1413(Top 12%)1413(Top 26%)
20K12.43 mi3.11 mi9296-101543-271543-279527(Top 34%)1754(Top 14%)1754(Top 32%)
Half13.11 mi0.68 mi9376-801592-491592-4911395(Top 40%)2640(Top 22%)2640(Top 48%)
25K15.53 mi2.42 mi9661-2851750-1581750-15811229(Top 40%)2705(Top 22%)2705(Top 49%)
30K18.64 mi3.11 mi10283-6222091-3412091-34113173(Top 46%)3930(Top 32%)3930(Top 72%)
20M20.00 mi1.36 mi10506-2232257-1662257-16612997(Top 46%)3968(Top 32%)3968(Top 73%)
21M21.00 mi1.00 mi10710-2042399-1422399-14214268(Top 50%)4761(Top 39%)4761(Top 87%)
35K21.75 mi0.75 mi10714-42417-182417-1811327(Top 40%)3279(Top 27%)3279(Top 60%)
23M23.00 mi1.25 mi10840-1262527-1102527-11013355(Top 47%)4451(Top 36%)4451(Top 81%)
24M24.00 mi1.00 mi10841-12569-422569-4211502(Top 40%)3564(Top 29%)3564(Top 65%)
40K24.85 mi0.85 mi11121-2802754-1852754-18517648(Top 62%)6935(Top 57%)6935(Top 127%)
25.2M25.20 mi0.35 mi11218-972822-682822-6816821(Top 59%)6475(Top 53%)6475(Top 118%)
Finish26.22 mi1.02 mi11411-1932959-1372959-13715740(Top 55%)5872(Top 48%)5872(Top 107%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 32%
×21story building
+97ft-345ft

Overall

8954

Females

1413

F18-39

1413

5K→10K

3.1 - 6.2 mi

Top 33%
×5story building
+79ft-138ft

Overall

9362

Females

1542

F18-39

1542

10K→15K

6.2 - 9.3 mi

Top 32%
×3story building
+67ft-78ft

Overall

8954

Females

1413

F18-39

1413

15K→20K

9.3 - 12.4 mi

Top 34%
×5story building
+106ft-86ft

Overall

9527

Females

1754

F18-39

1754

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

11395

Females

2640

F18-39

2640

Half→25K

13.1 - 15.5 mi

Top 40%
×4story building
+66ft-88ft

Overall

11229

Females

2705

F18-39

2705

25K→30K

15.5 - 18.6 mi

Top 46%
×9story building
+181ft-148ft

Overall

13173

Females

3930

F18-39

3930

30K→20M

18.6 - 20.0 mi

Top 46%
×5story building
+64ft-50ft

Overall

12997

Females

3968

F18-39

3968

20M→21M

20.0 - 21.0 mi

Top 50%
×8story building
+106ft-24ft

Overall

14268

Females

4761

F18-39

4761

21M→35K

21.0 - 21.8 mi

Top 40%
×7story building
+17ft-86ft

Overall

11327

Females

3279

F18-39

3279

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

13355

Females

4451

F18-39

4451

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11502

Females

3564

F18-39

3564

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

17648

Females

6935

F18-39

6935

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

16821

Females

6475

F18-39

6475

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2story building
+22ft-21ft

Overall

15740

Females

5872

F18-39

5872

Passing Analysis

Category:
Athletes Passed
1348
Passed By
3100
Net Change
-1754
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9657
5K → 10K329153+176#9657#9481
10K → 15K26974+195#9481#9286
15K → 20K174184-10#9286#9296
20K → Half1090-80#9296#9376
Half → 25K85370-285#9376#9661
25K → 30K89709-622#9661#10283
30K → 20M64287-223#10283#10506
20M → 21M55259-204#10506#10710
21M → 35K5054-4#10710#10714
35K → 23M73199-126#10714#10840
23M → 24M8384-1#10840#10841
24M → 40K19299-280#10841#11121
40K → 25.2M18115-97#11121#11218
25.2M → Finish30223-193#11218#11411
TOTALS13483100-1754
📊

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