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BOSTON MARATHON 2025

Megan Isom

Bib: 17615•F

CA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:40
Rank: #20366
Start → 5K
26:40 | 8:35/mi
10K· 6.21 mi
53:38
Rank: #20566 (-200)
5K → 10K
26:58 | 8:41/mi
15K· 9.32 mi
1:21:02
Rank: #20728 (-162)
10K → 15K
27:24 | 8:49/mi
20K· 12.43 mi
1:49:21
Rank: #20932 (-204)
15K → 20K
28:19 | 9:07/mi
Half· 13.11 mi
1:55:22
Rank: #20933 (-1)
20K → Half
6:01 | 8:49/mi
25K· 15.53 mi
2:17:39
Rank: #20916 (+17)
Half → 25K
22:17 | 9:11/mi
30K· 18.64 mi
2:47:28
Rank: #20790 (+126)
25K → 30K
29:49 | 9:36/mi
20M
3:00:17
Rank: #20619 (+171)
30K → 20M
12:49 | 9:26/mi
21M
3:08:40
Rank: #20114 (+505)
20M → 21M
8:23 | 8:23/mi
35K· 21.75 mi
3:14:30
Rank: #19843 (+271)
21M → 35K
5:50 | 7:48/mi
23M
3:24:33
Rank: #19373 (+470)
35K → 23M
10:03 | 8:02/mi
24M
3:32:14
Rank: #19007 (+366)
23M → 24M
7:41 | 7:41/mi
40K· 24.85 mi
3:38:57
Rank: #18674 (+333)
24M → 40K
6:43 | 7:51/mi
25.2M
3:41:55
Rank: #18519 (+155)
40K → 25.2M
2:58 | 8:36/mi
Finish· 26.22 mi
3:49:24
Rank: #18180 (+339)
25.2M → Finish
7:29 | 7:21/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:55:22
Pace8:48 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:54:02
Pace8:42 /mi
📊Negative Split: 1.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4326:408:3526:40
8:35
-
10K
6.21 mi11:52:4153:388:3826:58
8:41
+0:06
15K
9.32 mi12:20:051:21:028:4227:24
8:49
+0:08
20K
12.43 mi12:48:241:49:218:4828:19
9:07
+0:18
Half
13.11 mi12:54:251:55:228:486:01
8:49
-0:18
25K
15.53 mi13:16:422:17:398:5222:17
9:11
+0:22
30K
18.64 mi13:46:312:47:288:5929:49
9:36
+0:25
20M
20.00 mi13:59:203:00:179:0112:49
9:26
-0:10
21M
21.00 mi14:07:433:08:408:598:23
8:23
-1:03
35K
21.75 mi14:13:333:14:308:575:50
7:48
-0:35
23M
23.00 mi14:23:363:24:338:5410:03
8:02
+0:14
24M
24.00 mi14:31:173:32:148:517:41
7:41
-0:21
40K
24.85 mi14:38:003:38:578:496:43
7:51
+0:10
25.2M
25.20 mi14:40:583:41:558:482:58
8:36
+0:45
Finish
26.22 mi14:48:273:49:248:457:29
7:21
-1:15

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

7:21 /mi

Average Pace

8:45 /mi

Slowest Pace

9:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

37:46

16% of race

Time at Steady Pace

1:38:24

43% of race

Time at Slower Pace

1:33:14

41% of race

Average Pace: 8:45 /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 mi11:25:4326:408:3526:40
8:35
#20366
10K
6.21 mi11:52:4153:388:3826:58
8:41
#20566
15K
9.32 mi12:20:051:21:028:4227:24
8:49
#20728
20K
12.43 mi12:48:241:49:218:4828:19
9:07
#20932
Half
13.11 mi12:54:251:55:228:486:01
8:49
#20933
25K
15.53 mi13:16:422:17:398:5222:17
9:11
#20916
30K
18.64 mi13:46:312:47:288:5929:49
9:36
#20790
20M
20.00 mi13:59:203:00:179:0112:49
9:26
#20619
21M
21.00 mi14:07:433:08:408:598:23
8:23
#20114
35K
21.75 mi14:13:333:14:308:575:50
7:48
#19843
23M
23.00 mi14:23:363:24:338:5410:03
8:02
#19373
24M
24.00 mi14:31:173:32:148:517:41
7:41
#19007
40K
24.85 mi14:38:003:38:578:496:43
7:51
#18674
25.2M
25.20 mi14:40:583:41:558:482:58
8:36
#18519
Finish
26.22 mi14:48:273:49:248:457:29
7:21
#18180
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi203667724772421116(Top 74%)8061(Top 66%)8061(Top 147%)
10K6.21 mi3.10 mi20566-2007806-827806-8220762(Top 73%)7894(Top 65%)7894(Top 144%)
15K9.32 mi3.11 mi20728-1627879-737879-7321116(Top 74%)8061(Top 66%)8061(Top 147%)
20K12.43 mi3.11 mi20932-2047993-1147993-11421511(Top 76%)8318(Top 68%)8318(Top 152%)
Half13.11 mi0.68 mi20933-17994-17994-121000(Top 74%)8033(Top 66%)8033(Top 147%)
25K15.53 mi2.42 mi20916+177995-17995-120719(Top 73%)7929(Top 65%)7929(Top 145%)
30K18.64 mi3.11 mi20790+1267980+157980+1520339(Top 72%)7842(Top 64%)7842(Top 143%)
20M20.00 mi1.36 mi20619+1717900+807900+8018868(Top 66%)7194(Top 59%)7194(Top 132%)
21M21.00 mi1.00 mi20114+5057646+2547646+2549799(Top 34%)2528(Top 21%)2528(Top 46%)
35K21.75 mi0.75 mi19843+2717497+1497497+14910901(Top 38%)3084(Top 25%)3084(Top 56%)
23M23.00 mi1.25 mi19373+4707269+2287269+22810272(Top 36%)2890(Top 24%)2890(Top 53%)
24M24.00 mi1.00 mi19007+3667071+1987071+1989063(Top 32%)2371(Top 19%)2371(Top 43%)
40K24.85 mi0.85 mi18674+3336916+1556916+1559236(Top 33%)2580(Top 21%)2580(Top 47%)
25.2M25.20 mi0.35 mi18519+1556846+706846+709570(Top 34%)2847(Top 23%)2847(Top 52%)
Finish26.22 mi1.02 mi18180+3396671+1756671+1758132(Top 29%)2140(Top 18%)2140(Top 39%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

21116

Females

8061

F18-39

8061

5K→10K

3.1 - 6.2 mi

Top 73%
×5stories
+79ft-138ft

Overall

20762

Females

7894

F18-39

7894

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

21116

Females

8061

F18-39

8061

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

21511

Females

8318

F18-39

8318

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

21000

Females

8033

F18-39

8033

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

20719

Females

7929

F18-39

7929

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

20339

Females

7842

F18-39

7842

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

18868

Females

7194

F18-39

7194

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9799

Females

2528

F18-39

2528

21M→35K

21.0 - 21.8 mi

Top 38%
×7stories
+17ft-86ft

Overall

10901

Females

3084

F18-39

3084

35K→23M

21.8 - 23.0 mi

Top 36%
×5stories
+23ft-63ft

Overall

10272

Females

2890

F18-39

2890

23M→24M

23.0 - 24.0 mi

Top 32%
×6stories
+12ft-82ft

Overall

9063

Females

2371

F18-39

2371

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9236

Females

2580

F18-39

2580

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9570

Females

2847

F18-39

2847

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2stories
+22ft-21ft

Overall

8132

Females

2140

F18-39

2140

Passing Analysis

Category:
Athletes Passed
3557
Passed By
1371
Net Change
+2186
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20366
5K → 10K198398-200#20366#20566
10K → 15K138300-162#20566#20728
15K → 20K123327-204#20728#20932
20K → Half3435-1#20932#20933
Half → 25K152135+17#20933#20916
25K → 30K274148+126#20916#20790
30K → 20M19625+171#20790#20619
20M → 21M5050+505#20619#20114
21M → 35K2710+271#20114#19843
35K → 23M4711+470#19843#19373
23M → 24M3660+366#19373#19007
24M → 40K3330+333#19007#18674
40K → 25.2M1561+155#18674#18519
25.2M → Finish3401+339#18519#18180
TOTALS35571371+2186
📊

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