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BOSTON MARATHON 2025

Sarah Heacock

Bib: 14668•F

DC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 32%
Gender (Female)
#0 / 12228
Top 15%
Division (F18-39)
#0 / 5469
Top 27%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:39
Rank: #10284
Start → 5K
22:39 | 7:17/mi
10K· 6.21 mi
45:11
Rank: #10096 (+188)
5K → 10K
22:32 | 7:15/mi
15K· 9.32 mi
1:07:37
Rank: #9803 (+293)
10K → 15K
22:26 | 7:13/mi
20K· 12.43 mi
1:30:20
Rank: #9591 (+212)
15K → 20K
22:43 | 7:19/mi
Half· 13.11 mi
1:35:13
Rank: #9536 (+55)
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:53:05
Rank: #9401 (+135)
Half → 25K
17:52 | 7:22/mi
30K· 18.64 mi
2:16:51
Rank: #9217 (+184)
25K → 30K
23:46 | 7:39/mi
20M
2:27:26
Rank: #9168 (+49)
30K → 20M
10:35 | 7:47/mi
21M
2:35:44
Rank: #9131 (+37)
20M → 21M
8:18 | 8:18/mi
35K· 21.75 mi
2:41:17
Rank: #9065 (+66)
21M → 35K
5:33 | 7:25/mi
23M
2:50:58
Rank: #8938 (+127)
35K → 23M
9:41 | 7:44/mi
24M
2:58:43
Rank: #8928 (+10)
23M → 24M
7:45 | 7:45/mi
40K· 24.85 mi
3:05:41
Rank: #8982 (-54)
24M → 40K
6:58 | 8:09/mi
25.2M
3:08:47
Rank: #9026 (-44)
40K → 25.2M
3:06 | 8:59/mi
Finish· 26.22 mi
3:16:50
Rank: #9144 (-118)
25.2M → Finish
8:03 | 7:54/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:35:13
Pace7:16 /mi
2nd Half
Distance13.11 mi
Time1:41:37
Pace7:45 /mi
📊Positive Split: 6.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:0122:397:1722:39
7:17
-
10K
6.21 mi11:15:3345:117:1622:32
7:15
-0:02
15K
9.32 mi11:37:591:07:377:1522:26
7:13
-0:02
20K
12.43 mi12:00:421:30:207:1622:43
7:19
+0:06
Half
13.11 mi12:05:351:35:137:164:53
7:09
-0:10
25K
15.53 mi12:23:271:53:057:1717:52
7:22
+0:13
30K
18.64 mi12:47:132:16:517:2023:46
7:39
+0:17
20M
20.00 mi12:57:482:27:267:2210:35
7:47
+0:08
21M
21.00 mi13:06:062:35:447:258:18
8:18
+0:31
35K
21.75 mi13:11:392:41:177:255:33
7:25
-0:53
23M
23.00 mi13:21:202:50:587:269:41
7:44
+0:19
24M
24.00 mi13:29:052:58:437:277:45
7:45
+0:01
40K
24.85 mi13:36:033:05:417:286:58
8:09
+0:24
25.2M
25.20 mi13:39:093:08:477:293:06
8:59
+0:50
Finish
26.22 mi13:47:123:16:507:318:03
7:54
-1:05

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

7:09 /mi

Average Pace

7:31 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:53:05

57% of race

Time at Steady Pace

57:20

29% of race

Time at Slower Pace

26:25

13% of race

Average Pace: 7:30 /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 mi10:53:0122:397:1722:39
7:17
#10284
10K
6.21 mi11:15:3345:117:1622:32
7:15
#10096
15K
9.32 mi11:37:591:07:377:1522:26
7:13
#9803
20K
12.43 mi12:00:421:30:207:1622:43
7:19
#9591
Half
13.11 mi12:05:351:35:137:164:53
7:09
#9536
25K
15.53 mi12:23:271:53:057:1717:52
7:22
#9401
30K
18.64 mi12:47:132:16:517:2023:46
7:39
#9217
20M
20.00 mi12:57:482:27:267:2210:35
7:47
#9168
21M
21.00 mi13:06:062:35:447:258:18
8:18
#9131
35K
21.75 mi13:11:392:41:177:255:33
7:25
#9065
23M
23.00 mi13:21:202:50:587:269:41
7:44
#8938
24M
24.00 mi13:29:052:58:437:277:45
7:45
#8928
40K
24.85 mi13:36:033:05:417:286:58
8:09
#8982
25.2M
25.20 mi13:39:093:08:477:293:06
8:59
#9026
Finish
26.22 mi13:47:123:16:507:318:03
7:54
#9144
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10284193919399310(Top 33%)1569(Top 13%)1569(Top 29%)
10K6.21 mi3.10 mi10096+1881857+821857+829959(Top 35%)1815(Top 15%)1815(Top 33%)
15K9.32 mi3.11 mi9803+2931747+1101747+1109310(Top 33%)1569(Top 13%)1569(Top 29%)
20K12.43 mi3.11 mi9591+2121684+631684+639149(Top 32%)1591(Top 13%)1591(Top 29%)
Half13.11 mi0.68 mi9536+551667+171667+178816(Top 31%)1428(Top 12%)1428(Top 26%)
25K15.53 mi2.42 mi9401+1351630+371630+378928(Top 31%)1612(Top 13%)1612(Top 29%)
30K18.64 mi3.11 mi9217+1841605+251605+258834(Top 31%)1761(Top 14%)1761(Top 32%)
20M20.00 mi1.36 mi9168+491611-61611-68960(Top 32%)1967(Top 16%)1967(Top 36%)
21M21.00 mi1.00 mi9131+371629-181629-189236(Top 33%)2260(Top 18%)2260(Top 41%)
35K21.75 mi0.75 mi9065+661624+51624+58099(Top 29%)1725(Top 14%)1725(Top 32%)
23M23.00 mi1.25 mi8938+1271618+61618+68128(Top 29%)1874(Top 15%)1874(Top 34%)
24M24.00 mi1.00 mi8928+101646-281646-289468(Top 33%)2545(Top 21%)2545(Top 47%)
40K24.85 mi0.85 mi8982-541701-551701-5511220(Top 40%)3504(Top 29%)3504(Top 64%)
25.2M25.20 mi0.35 mi9026-441738-371738-3711763(Top 41%)3839(Top 31%)3839(Top 70%)
Finish26.22 mi1.02 mi9144-1181831-931831-9312170(Top 43%)4007(Top 33%)4007(Top 73%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 33%
×21stories
+97ft-345ft

Overall

9310

Females

1569

F18-39

1569

5K→10K

3.1 - 6.2 mi

Top 35%
×5stories
+79ft-138ft

Overall

9959

Females

1815

F18-39

1815

10K→15K

6.2 - 9.3 mi

Top 33%
×3stories
+67ft-78ft

Overall

9310

Females

1569

F18-39

1569

15K→20K

9.3 - 12.4 mi

Top 32%
×5stories
+106ft-86ft

Overall

9149

Females

1591

F18-39

1591

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8816

Females

1428

F18-39

1428

Half→25K

13.1 - 15.5 mi

Top 31%
×4stories
+66ft-88ft

Overall

8928

Females

1612

F18-39

1612

25K→30K

15.5 - 18.6 mi

Top 31%
×9stories
+181ft-148ft

Overall

8834

Females

1761

F18-39

1761

30K→20M

18.6 - 20.0 mi

Top 32%
×5stories
+64ft-50ft

Overall

8960

Females

1967

F18-39

1967

20M→21M

20.0 - 21.0 mi

Top 33%
×8stories
+106ft-24ft

Overall

9236

Females

2260

F18-39

2260

21M→35K

21.0 - 21.8 mi

Top 29%
×7stories
+17ft-86ft

Overall

8099

Females

1725

F18-39

1725

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

8128

Females

1874

F18-39

1874

23M→24M

23.0 - 24.0 mi

Top 33%
×6stories
+12ft-82ft

Overall

9468

Females

2545

F18-39

2545

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11220

Females

3504

F18-39

3504

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11763

Females

3839

F18-39

3839

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2stories
+22ft-21ft

Overall

12170

Females

4007

F18-39

4007

Passing Analysis

Category:
Athletes Passed
2278*
Passed By
1138
Net Change
+1140
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10284
5K → 10K345157+188#10284#10096
10K → 15K353*60+293#10096#9803
15K → 20K29179+212#9803#9591
20K → Half627+55#9591#9536
Half → 25K20873+135#9536#9401
25K → 30K304120+184#9401#9217
30K → 20M12374+49#9217#9168
20M → 21M11780+37#9168#9131
21M → 35K8418+66#9131#9065
35K → 23M17144+127#9065#8938
23M → 24M8070+10#8938#8928
24M → 40K63117-54#8928#8982
40K → 25.2M2771-44#8982#9026
25.2M → Finish50168-118#9026#9144
TOTALS2278*1138+1140

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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