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BOSTON MARATHON 2025

Emily Grandfield

Bib: 13166•F

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0:00
0:00
/ mi
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Overall
#0 / 28404
Top 34%
Gender (Female)
#0 / 12228
Top 17%
Age Group (F18-39)
#0 / 5469
Top 30%
Race Day Weather
50°/40°F
broken clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
22:34
Rank: #10023
Start → 5K
22:34 | 7:16/mi
10K· 6.21 mi
44:52
Rank: #9643 (+380)
5K → 10K
22:18 | 7:11/mi
15K· 9.32 mi
1:07:28
Rank: #9652 (-9)
10K → 15K
22:36 | 7:16/mi
20K· 12.43 mi
1:30:40
Rank: #9841 (-189)
15K → 20K
23:12 | 7:28/mi
Half· 13.11 mi
1:35:40
Rank: #9858 (-17)
20K → Half
5:00 | 7:20/mi
25K· 15.53 mi
1:54:08
Rank: #9975 (-117)
Half → 25K
18:28 | 7:37/mi
30K· 18.64 mi
2:18:40
Rank: #10039 (-64)
25K → 30K
24:32 | 7:54/mi
20M
2:29:27
Rank: #9981 (+58)
30K → 20M
10:47 | 7:56/mi
21M
2:37:51
Rank: #9956 (+25)
20M → 21M
8:24 | 8:24/mi
35K· 21.75 mi
2:43:39
Rank: #9952 (+4)
21M → 35K
5:48 | 7:45/mi
23M
2:53:30
Rank: #9889 (+63)
35K → 23M
9:51 | 7:52/mi
24M
3:01:16
Rank: #9826 (+63)
23M → 24M
7:46 | 7:46/mi
40K· 24.85 mi
3:07:57
Rank: #9765 (+61)
24M → 40K
6:41 | 7:49/mi
25.2M
3:10:52
Rank: #9722 (+43)
40K → 25.2M
2:55 | 8:27/mi
Finish· 26.22 mi
3:18:31
Rank: #9691 (+31)
25.2M → Finish
7:39 | 7:30/mi
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Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via Half
Distance13.11 mi
Time1:35:40
Pace7:18 /mi
2nd Half
Distance13.11 mi
Time1:42:51
Pace7:51 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4922:347:1622:34
7:16
-
10K
6.21 mi11:14:0744:527:1322:18
7:11
-0:05
15K
9.32 mi11:36:431:07:287:1422:36
7:16
+0:05
20K
12.43 mi11:59:551:30:407:1823:12
7:28
+0:12
Half
13.11 mi12:04:551:35:407:185:00
7:20
-0:08
25K
15.53 mi12:23:231:54:087:2118:28
7:37
+0:17
30K
18.64 mi12:47:552:18:407:2624:32
7:54
+0:17
20M
20.00 mi12:58:422:29:277:2810:47
7:56
+0:02
21M
21.00 mi13:07:062:37:517:318:24
8:24
+0:28
35K
21.75 mi13:12:542:43:397:315:48
7:45
-0:39
23M
23.00 mi13:22:452:53:307:339:51
7:52
+0:07
24M
24.00 mi13:30:313:01:167:337:46
7:46
-0:06
40K
24.85 mi13:37:123:07:577:346:41
7:49
+0:03
25.2M
25.20 mi13:40:073:10:527:342:55
8:27
+0:38
Finish
26.22 mi13:47:463:18:317:357:39
7:30
-0:57

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:35 /mi

Slowest Pace

8:27 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:56:25

89% of race

Time at Steady Pace

22:06

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:34 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:51:4922:347:1622:34
7:16
#10023
10K
6.21 mi11:14:0744:527:1322:18
7:11
#9643
15K
9.32 mi11:36:431:07:287:1422:36
7:16
#9652
20K
12.43 mi11:59:551:30:407:1823:12
7:28
#9841
Half
13.11 mi12:04:551:35:407:185:00
7:20
#9858
25K
15.53 mi12:23:231:54:087:2118:28
7:37
#9975
30K
18.64 mi12:47:552:18:407:2624:32
7:54
#10039
20M
20.00 mi12:58:422:29:277:2810:47
7:56
#9981
21M
21.00 mi13:07:062:37:517:318:24
8:24
#9956
35K
21.75 mi13:12:542:43:397:315:48
7:45
#9952
23M
23.00 mi13:22:452:53:307:339:51
7:52
#9889
24M
24.00 mi13:30:313:01:167:337:46
7:46
#9826
40K
24.85 mi13:37:123:07:577:346:41
7:49
#9765
25.2M
25.20 mi13:40:073:10:527:342:55
8:27
#9722
Finish
26.22 mi13:47:463:18:317:357:39
7:30
#9691
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10023181818189794(Top 34%)1796(Top 15%)1796(Top 33%)
10K6.21 mi3.10 mi9643+3801638+1801638+1809312(Top 33%)1521(Top 12%)1521(Top 28%)
15K9.32 mi3.11 mi9652-91672-341672-349794(Top 34%)1796(Top 15%)1796(Top 33%)
20K12.43 mi3.11 mi9841-1891795-1231795-12310497(Top 37%)2208(Top 18%)2208(Top 40%)
Half13.11 mi0.68 mi9858-171803-81803-810324(Top 36%)2104(Top 17%)2104(Top 38%)
25K15.53 mi2.42 mi9975-1171891-881891-8810915(Top 38%)2537(Top 21%)2537(Top 46%)
30K18.64 mi3.11 mi10039-641973-821973-8210606(Top 37%)2595(Top 21%)2595(Top 47%)
20M20.00 mi1.36 mi9981+581978-51978-510024(Top 35%)2440(Top 20%)2440(Top 45%)
21M21.00 mi1.00 mi9956+252007-292007-299858(Top 35%)2542(Top 21%)2542(Top 46%)
35K21.75 mi0.75 mi9952+42043-362043-3610480(Top 37%)2831(Top 23%)2831(Top 52%)
23M23.00 mi1.25 mi9889+632059-162059-169072(Top 32%)2289(Top 19%)2289(Top 42%)
24M24.00 mi1.00 mi9826+632054+52054+59586(Top 34%)2592(Top 21%)2592(Top 47%)
40K24.85 mi0.85 mi9765+612063-92063-98910(Top 31%)2407(Top 20%)2407(Top 44%)
25.2M25.20 mi0.35 mi9722+432057+62057+68618(Top 30%)2331(Top 19%)2331(Top 43%)
Finish26.22 mi1.02 mi9691+312088-312088-319254(Top 33%)2641(Top 22%)2641(Top 48%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21stories
+97ft-345ft

Overall

9794

Females

1796

F18-39

1796

5K→10K

3.1 - 6.2 mi

Top 33%
×5stories
+79ft-138ft

Overall

9312

Females

1521

F18-39

1521

10K→15K

6.2 - 9.3 mi

Top 34%
×3stories
+67ft-78ft

Overall

9794

Females

1796

F18-39

1796

15K→20K

9.3 - 12.4 mi

Top 37%
×5stories
+106ft-86ft

Overall

10497

Females

2208

F18-39

2208

20K→Half

12.4 - 13.1 mi

Top 36%
×2stories
+19ft-37ft

Overall

10324

Females

2104

F18-39

2104

Half→25K

13.1 - 15.5 mi

Top 38%
×4stories
+66ft-88ft

Overall

10915

Females

2537

F18-39

2537

25K→30K

15.5 - 18.6 mi

Top 37%
×9stories
+181ft-148ft

Overall

10606

Females

2595

F18-39

2595

30K→20M

18.6 - 20.0 mi

Top 35%
×5stories
+64ft-50ft

Overall

10024

Females

2440

F18-39

2440

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9858

Females

2542

F18-39

2542

21M→35K

21.0 - 21.8 mi

Top 37%
×7stories
+17ft-86ft

Overall

10480

Females

2831

F18-39

2831

35K→23M

21.8 - 23.0 mi

Top 32%
×5stories
+23ft-63ft

Overall

9072

Females

2289

F18-39

2289

23M→24M

23.0 - 24.0 mi

Top 34%
×6stories
+12ft-82ft

Overall

9586

Females

2592

F18-39

2592

24M→40K

24.0 - 24.9 mi

Top 31%
×1story
+6ft-20ft

Overall

8910

Females

2407

F18-39

2407

40K→25.2M

24.9 - 25.2 mi

Top 30%
×1story
+13ft-16ft

Overall

8618

Females

2331

F18-39

2331

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

9254

Females

2641

F18-39

2641

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
1942
Passed By
1605
Net Change
+332
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10023
5K → 10K47090+380#10023#9643
10K → 15K167175-9#9643#9652
15K → 20K136325-189#9652#9841
20K → Half2643-17#9841#9858
Half → 25K118235-117#9858#9975
25K → 30K208271-64#9975#10039
30K → 20M14789+58#10039#9981
20M → 21M12094+25#9981#9956
21M → 35K7267+4#9956#9952
35K → 23M13167+63#9952#9889
23M → 24M10441+63#9889#9826
24M → 40K9534+61#9826#9765
40K → 25.2M6017+43#9765#9722
25.2M → Finish8857+31#9722#9691
TOTALS19421605+332
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing