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BOSTON MARATHON 2025

Sarah Lancour

Bib: 17436•F

WI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 32%
Gender (Female)
#0 / 12228
Top 14%
Division (F18-39)
#0 / 5469
Top 26%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:23
Rank: #12468
Start → 5K
23:23 | 7:32/mi
10K· 6.21 mi
46:20
Rank: #11756 (+712)
5K → 10K
22:57 | 7:23/mi
15K· 9.32 mi
1:09:19
Rank: #11425 (+331)
10K → 15K
22:59 | 7:24/mi
20K· 12.43 mi
1:32:05
Rank: #10847 (+578)
15K → 20K
22:46 | 7:20/mi
Half· 13.11 mi
1:37:03
Rank: #10796 (+51)
20K → Half
4:58 | 7:17/mi
25K· 15.53 mi
1:55:03
Rank: #10510 (+286)
Half → 25K
18:00 | 7:25/mi
30K· 18.64 mi
2:18:28
Rank: #9938 (+572)
25K → 30K
23:25 | 7:32/mi
20M
2:28:49
Rank: #9713 (+225)
30K → 20M
10:21 | 7:37/mi
21M
2:36:54
Rank: #9571 (+142)
20M → 21M
8:05 | 8:05/mi
35K· 21.75 mi
2:42:30
Rank: #9507 (+64)
21M → 35K
5:36 | 7:29/mi
23M
2:52:03
Rank: #9337 (+170)
35K → 23M
9:33 | 7:38/mi
24M
2:59:26
Rank: #9187 (+150)
23M → 24M
7:23 | 7:23/mi
40K· 24.85 mi
3:05:48
Rank: #9033 (+154)
24M → 40K
6:22 | 7:27/mi
25.2M
3:08:37
Rank: #8968 (+65)
40K → 25.2M
2:49 | 8:10/mi
Finish· 26.22 mi
3:16:18
Rank: #8957 (+11)
25.2M → Finish
7:41 | 7:32/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:03
Pace7:24 /mi
2nd Half
Distance13.11 mi
Time1:39:15
Pace7:34 /mi
📊Positive Split: 2.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:3023:237:3223:23
7:32
-
10K
6.21 mi11:36:2746:207:2722:57
7:23
-0:09
15K
9.32 mi11:59:261:09:197:2622:59
7:24
+0:01
20K
12.43 mi12:22:121:32:057:2522:46
7:20
-0:04
Half
13.11 mi12:27:101:37:037:244:58
7:17
-0:03
25K
15.53 mi12:45:101:55:037:2418:00
7:25
+0:08
30K
18.64 mi13:08:352:18:287:2623:25
7:32
+0:07
20M
20.00 mi13:18:562:28:497:2610:21
7:37
+0:05
21M
21.00 mi13:27:012:36:547:288:05
8:05
+0:28
35K
21.75 mi13:32:372:42:307:285:36
7:29
-0:36
23M
23.00 mi13:42:102:52:037:299:33
7:38
+0:09
24M
24.00 mi13:49:332:59:267:297:23
7:23
-0:15
40K
24.85 mi13:55:553:05:487:296:22
7:27
+0:04
25.2M
25.20 mi13:58:443:08:377:292:49
8:10
+0:43
Finish
26.22 mi14:06:253:16:187:307:41
7:32
-0:38

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

7:17 /mi

Average Pace

7:30 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:05:24

94% of race

Time at Steady Pace

10:54

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:29 /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 mi11:13:3023:237:3223:23
7:32
#12468
10K
6.21 mi11:36:2746:207:2722:57
7:23
#11756
15K
9.32 mi11:59:261:09:197:2622:59
7:24
#11425
20K
12.43 mi12:22:121:32:057:2522:46
7:20
#10847
Half
13.11 mi12:27:101:37:037:244:58
7:17
#10796
25K
15.53 mi12:45:101:55:037:2418:00
7:25
#10510
30K
18.64 mi13:08:352:18:287:2623:25
7:32
#9938
20M
20.00 mi13:18:562:28:497:2610:21
7:37
#9713
21M
21.00 mi13:27:012:36:547:288:05
8:05
#9571
35K
21.75 mi13:32:372:42:307:285:36
7:29
#9507
23M
23.00 mi13:42:102:52:037:299:33
7:38
#9337
24M
24.00 mi13:49:332:59:267:297:23
7:23
#9187
40K
24.85 mi13:55:553:05:487:296:22
7:27
#9033
25.2M
25.20 mi13:58:443:08:377:292:49
8:10
#8968
Finish
26.22 mi14:06:253:16:187:307:41
7:32
#8957
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi124683045304510862(Top 38%)2300(Top 19%)2300(Top 42%)
10K6.21 mi3.10 mi11756+7122677+3682677+36811081(Top 39%)2341(Top 19%)2341(Top 43%)
15K9.32 mi3.11 mi11425+3312537+1402537+14010862(Top 38%)2300(Top 19%)2300(Top 42%)
20K12.43 mi3.11 mi10847+5782260+2772260+2779282(Top 33%)1643(Top 13%)1643(Top 30%)
Half13.11 mi0.68 mi10796+512238+222238+229881(Top 35%)1897(Top 16%)1897(Top 35%)
25K15.53 mi2.42 mi10510+2862134+1042134+1049346(Top 33%)1792(Top 15%)1792(Top 33%)
30K18.64 mi3.11 mi9938+5721927+2071927+2078018(Top 28%)1400(Top 11%)1400(Top 26%)
20M20.00 mi1.36 mi9713+2251863+641863+647826(Top 28%)1477(Top 12%)1477(Top 27%)
21M21.00 mi1.00 mi9571+1421828+351828+357877(Top 28%)1674(Top 14%)1674(Top 31%)
35K21.75 mi0.75 mi9507+641815+131815+138548(Top 30%)1914(Top 16%)1914(Top 35%)
23M23.00 mi1.25 mi9337+1701787+281787+287458(Top 26%)1598(Top 13%)1598(Top 29%)
24M24.00 mi1.00 mi9187+1501746+411746+416977(Top 25%)1447(Top 12%)1447(Top 26%)
40K24.85 mi0.85 mi9033+1541723+231723+236523(Top 23%)1351(Top 11%)1351(Top 25%)
25.2M25.20 mi0.35 mi8968+651714+91714+96946(Top 24%)1618(Top 13%)1618(Top 30%)
Finish26.22 mi1.02 mi8957+111750-361750-369500(Top 33%)2755(Top 23%)2755(Top 50%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21stories
+97ft-345ft

Overall

10862

Females

2300

F18-39

2300

5K→10K

3.1 - 6.2 mi

Top 39%
×5stories
+79ft-138ft

Overall

11081

Females

2341

F18-39

2341

10K→15K

6.2 - 9.3 mi

Top 38%
×3stories
+67ft-78ft

Overall

10862

Females

2300

F18-39

2300

15K→20K

9.3 - 12.4 mi

Top 33%
×5stories
+106ft-86ft

Overall

9282

Females

1643

F18-39

1643

20K→Half

12.4 - 13.1 mi

Top 35%
×2stories
+19ft-37ft

Overall

9881

Females

1897

F18-39

1897

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

9346

Females

1792

F18-39

1792

25K→30K

15.5 - 18.6 mi

Top 28%
×9stories
+181ft-148ft

Overall

8018

Females

1400

F18-39

1400

30K→20M

18.6 - 20.0 mi

Top 28%
×5stories
+64ft-50ft

Overall

7826

Females

1477

F18-39

1477

20M→21M

20.0 - 21.0 mi

Top 28%
×8stories
+106ft-24ft

Overall

7877

Females

1674

F18-39

1674

21M→35K

21.0 - 21.8 mi

Top 30%
×7stories
+17ft-86ft

Overall

8548

Females

1914

F18-39

1914

35K→23M

21.8 - 23.0 mi

Top 26%
×5stories
+23ft-63ft

Overall

7458

Females

1598

F18-39

1598

23M→24M

23.0 - 24.0 mi

Top 25%
×6stories
+12ft-82ft

Overall

6977

Females

1447

F18-39

1447

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6523

Females

1351

F18-39

1351

40K→25.2M

24.9 - 25.2 mi

Top 24%
×1story
+13ft-16ft

Overall

6946

Females

1618

F18-39

1618

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

9500

Females

2755

F18-39

2755

Passing Analysis

Category:
Athletes Passed
3893*
Passed By
381
Net Change
+3511
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12468
5K → 10K77159+712#12468#11756
10K → 15K38251+331#11756#11425
15K → 20K5857+578#11425#10847
20K → Half576+51#10847#10796
Half → 25K32135+286#10796#10510
25K → 30K586*14+572#10510#9938
30K → 20M24519+225#9938#9713
20M → 21M16523+142#9713#9571
21M → 35K9026+64#9571#9507
35K → 23M19828+170#9507#9337
23M → 24M17222+150#9337#9187
24M → 40K17016+154#9187#9033
40K → 25.2M738+65#9033#8968
25.2M → Finish7867+11#8968#8957
TOTALS3893*381+3511

* 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