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BOSTON MARATHON 2025

Sandra Boucher-Mercier

Bib: 18504•F

QC

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 46%
Gender (Female)
#0 / 12228
Top 31%
Division (F18-39)
#0 / 5469
Top 49%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:12
Rank: #9046
Start → 5K
7:09/mi
22:12 split
10K· 6.21 mi
45:16
Rank: #10223 (-1177)
5K → 10K
7:25/mi
23:04 split
15K· 9.32 mi
1:08:47
Rank: #10887 (-664)
10K → 15K
7:34/mi
23:31 split
20K· 12.43 mi
1:33:22
Rank: #11753 (-866)
15K → 20K
7:55/mi
24:35 split
Half· 13.11 mi
1:38:40
Rank: #11868 (-115)
20K → Half
7:46/mi
5:18 split
25K· 15.53 mi
1:58:08
Rank: #12226 (-358)
Half → 25K
8:02/mi
19:28 split
30K· 18.64 mi
2:23:59
Rank: #12464 (-238)
25K → 30K
8:19/mi
25:51 split
20M
2:35:26
Rank: #12493 (-29)
30K → 20M
8:26/mi
11:27 split
21M
2:44:23
Rank: #12518 (-25)
20M → 21M
8:57/mi
8:57 split
35K· 21.75 mi
2:50:40
Rank: #12601 (-83)
21M → 35K
8:24/mi
6:17 split
23M
3:01:30
Rank: #12697 (-96)
35K → 23M
8:39/mi
10:50 split
24M
3:10:03
Rank: #12793 (-96)
23M → 24M
8:33/mi
8:33 split
40K· 24.85 mi
3:17:26
Rank: #12850 (-57)
24M → 40K
8:38/mi
7:23 split
25.2M
3:20:43
Rank: #12878 (-28)
40K → 25.2M
9:31/mi
3:17 split
Finish· 26.22 mi
3:29:11
Rank: #12971 (-93)
25.2M → Finish
8:19/mi
8:28 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:40
Pace7:32 /mi
2nd Half
Distance13.11 mi
Time1:50:31
Pace8:26 /mi
📊Positive Split: 12.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:1322:127:0922:12
7:09
-
10K
6.21 mi11:36:1745:167:1723:04
7:25
+0:16
15K
9.32 mi11:59:481:08:477:2323:31
7:34
+0:09
20K
12.43 mi12:24:231:33:227:3124:35
7:55
+0:21
Half
13.11 mi12:29:411:38:407:325:18
7:46
-0:09
25K
15.53 mi12:49:091:58:087:3619:28
8:02
+0:16
30K
18.64 mi13:15:002:23:597:4325:51
8:19
+0:17
20M
20.00 mi13:26:272:35:267:4611:27
8:26
+0:07
21M
21.00 mi13:35:242:44:237:508:57
8:57
+0:31
35K
21.75 mi13:41:412:50:407:516:17
8:24
-0:33
23M
23.00 mi13:52:313:01:307:5310:50
8:39
+0:15
24M
24.00 mi14:01:043:10:037:558:33
8:33
-0:06
40K
24.85 mi14:08:273:17:267:577:23
8:38
+0:05
25.2M
25.20 mi14:11:443:20:437:583:17
9:31
+0:53
Finish
26.22 mi14:20:123:29:117:598:28
8:19
-1:12

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

7:09 /mi

Average Pace

7:59 /mi

Slowest Pace

9:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:38:40

47% of race

Time at Steady Pace

1:20:04

38% of race

Time at Slower Pace

30:27

15% of race

Average Pace: 7:59 /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 mi11:13:1322:127:0922:12
7:09
#9046
10K
6.21 mi11:36:1745:167:1723:04
7:25
#10223
15K
9.32 mi11:59:481:08:477:2323:31
7:34
#10887
20K
12.43 mi12:24:231:33:227:3124:35
7:55
#11753
Half
13.11 mi12:29:411:38:407:325:18
7:46
#11868
25K
15.53 mi12:49:091:58:087:3619:28
8:02
#12226
30K
18.64 mi13:15:002:23:597:4325:51
8:19
#12464
20M
20.00 mi13:26:272:35:267:4611:27
8:26
#12493
21M
21.00 mi13:35:242:44:237:508:57
8:57
#12518
35K
21.75 mi13:41:412:50:407:516:17
8:24
#12601
23M
23.00 mi13:52:313:01:307:5310:50
8:39
#12697
24M
24.00 mi14:01:043:10:037:558:33
8:33
#12793
40K
24.85 mi14:08:273:17:267:577:23
8:38
#12850
25.2M
25.20 mi14:11:443:20:437:583:17
9:31
#12878
Finish
26.22 mi14:20:123:29:117:598:28
8:19
#12971
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi90461391139112346(Top 43%)3088(Top 25%)3088(Top 56%)
10K6.21 mi3.10 mi10223-11771918-5271918-52711427(Top 40%)2528(Top 21%)2528(Top 46%)
15K9.32 mi3.11 mi10887-6642264-3462264-34612346(Top 43%)3088(Top 25%)3088(Top 56%)
20K12.43 mi3.11 mi11753-8662744-4802744-48014206(Top 50%)4199(Top 34%)4199(Top 77%)
Half13.11 mi0.68 mi11868-1152811-672811-6714036(Top 49%)4069(Top 33%)4069(Top 74%)
25K15.53 mi2.42 mi12226-3583036-2253036-22514128(Top 50%)4262(Top 35%)4262(Top 78%)
30K18.64 mi3.11 mi12464-2383250-2143250-21413632(Top 48%)4161(Top 34%)4161(Top 76%)
20M20.00 mi1.36 mi12493-293304-543304-5413323(Top 47%)4147(Top 34%)4147(Top 76%)
21M21.00 mi1.00 mi12518-253350-463350-4613227(Top 47%)4226(Top 35%)4226(Top 77%)
35K21.75 mi0.75 mi12601-833417-673417-6714858(Top 52%)5147(Top 42%)5147(Top 94%)
23M23.00 mi1.25 mi12697-963500-833500-8314265(Top 50%)4937(Top 40%)4937(Top 90%)
24M24.00 mi1.00 mi12793-963585-853585-8514822(Top 52%)5277(Top 43%)5277(Top 96%)
40K24.85 mi0.85 mi12850-573647-623647-6214279(Top 50%)5108(Top 42%)5108(Top 93%)
25.2M25.20 mi0.35 mi12878-283679-323679-3214712(Top 52%)5382(Top 44%)5382(Top 98%)
Finish26.22 mi1.02 mi12971-933738-593738-5914974(Top 53%)5459(Top 45%)5459(Top 100%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 43%
×21stories
+97ft-345ft

Overall

12346

Females

3088

F18-39

3088

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

11427

Females

2528

F18-39

2528

10K→15K

6.2 - 9.3 mi

Top 43%
×3stories
+67ft-78ft

Overall

12346

Females

3088

F18-39

3088

15K→20K

9.3 - 12.4 mi

Top 50%
×5stories
+106ft-86ft

Overall

14206

Females

4199

F18-39

4199

20K→Half

12.4 - 13.1 mi

Top 49%
×2stories
+19ft-37ft

Overall

14036

Females

4069

F18-39

4069

Half→25K

13.1 - 15.5 mi

Top 50%
×4stories
+66ft-88ft

Overall

14128

Females

4262

F18-39

4262

25K→30K

15.5 - 18.6 mi

Top 48%
×9stories
+181ft-148ft

Overall

13632

Females

4161

F18-39

4161

30K→20M

18.6 - 20.0 mi

Top 47%
×5stories
+64ft-50ft

Overall

13323

Females

4147

F18-39

4147

20M→21M

20.0 - 21.0 mi

Top 47%
×8stories
+106ft-24ft

Overall

13227

Females

4226

F18-39

4226

21M→35K

21.0 - 21.8 mi

Top 52%
×7stories
+17ft-86ft

Overall

14858

Females

5147

F18-39

5147

35K→23M

21.8 - 23.0 mi

Top 50%
×5stories
+23ft-63ft

Overall

14265

Females

4937

F18-39

4937

23M→24M

23.0 - 24.0 mi

Top 52%
×6stories
+12ft-82ft

Overall

14822

Females

5277

F18-39

5277

24M→40K

24.0 - 24.9 mi

Top 50%
×1story
+6ft-20ft

Overall

14279

Females

5108

F18-39

5108

40K→25.2M

24.9 - 25.2 mi

Top 52%
×1story
+13ft-16ft

Overall

14712

Females

5382

F18-39

5382

25.2M→Finish

25.2 - 26.2 mi

Top 53%
×2stories
+22ft-21ft

Overall

14974

Females

5459

F18-39

5459

Passing Analysis

Category:
Athletes Passed
884
Passed By
4807
Net Change
-3925
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9046
5K → 10K261201-1177#9046#10223
10K → 15K54718-664#10223#10887
15K → 20K36902-866#10887#11753
20K → Half9124-115#11753#11868
Half → 25K76434-358#11868#12226
25K → 30K176414-238#12226#12464
30K → 20M106135-29#12464#12493
20M → 21M95120-25#12493#12518
21M → 35K47130-83#12518#12601
35K → 23M84180-96#12601#12697
23M → 24M49145-96#12697#12793
24M → 40K53110-57#12793#12850
40K → 25.2M2351-28#12850#12878
25.2M → Finish50143-93#12878#12971
TOTALS8844807-3925
📊

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