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BOSTON MARATHON 2025

Barb Isom

Bib: 24100•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F55-59)
#0 / 994
Top 48%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:40
Rank: #20373
Start → 5K
26:40 | 8:35/mi
10K· 6.21 mi
53:37
Rank: #20554 (-181)
5K → 10K
26:57 | 8:40/mi
15K· 9.32 mi
1:21:01
Rank: #20720 (-166)
10K → 15K
27:24 | 8:49/mi
20K· 12.43 mi
1:49:20
Rank: #20925 (-205)
15K → 20K
28:19 | 9:07/mi
Half· 13.11 mi
1:55:26
Rank: #20950 (-25)
20K → Half
6:06 | 8:56/mi
25K· 15.53 mi
2:17:38
Rank: #20908 (+42)
Half → 25K
22:12 | 9:09/mi
30K· 18.64 mi
2:47:31
Rank: #20804 (+104)
25K → 30K
29:53 | 9:37/mi
20M
3:01:06
Rank: #20815 (-11)
30K → 20M
13:35 | 10:00/mi
21M
3:11:38
Rank: #20756 (+59)
20M → 21M
10:32 | 10:32/mi
35K· 21.75 mi
3:18:39
Rank: #20731 (+25)
21M → 35K
7:01 | 9:23/mi
23M
3:30:50
Rank: #20677 (+54)
35K → 23M
12:11 | 9:44/mi
24M
3:40:12
Rank: #20613 (+64)
23M → 24M
9:22 | 9:22/mi
40K· 24.85 mi
3:48:24
Rank: #20577 (+36)
24M → 40K
8:12 | 9:35/mi
25.2M
3:52:04
Rank: #20579 (-2)
40K → 25.2M
3:40 | 10:38/mi
Finish· 26.22 mi
4:01:48
Rank: #20611 (-32)
25.2M → Finish
9:44 | 9:33/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:55:26
Pace8:48 /mi
2nd Half
Distance13.11 mi
Time2:06:22
Pace9:38 /mi
📊Positive Split: 9.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:4426:408:3526:40
8:35
-
10K
6.21 mi11:52:4153:378:3826:57
8:40
+0:05
15K
9.32 mi12:20:051:21:018:4227:24
8:49
+0:09
20K
12.43 mi12:48:241:49:208:4828:19
9:07
+0:18
Half
13.11 mi12:54:301:55:268:486:06
8:56
-0:11
25K
15.53 mi13:16:422:17:388:5222:12
9:09
+0:13
30K
18.64 mi13:46:352:47:318:5929:53
9:37
+0:28
20M
20.00 mi14:00:103:01:069:0313:35
10:00
+0:23
21M
21.00 mi14:10:423:11:389:0810:32
10:32
+0:32
35K
21.75 mi14:17:433:18:399:087:01
9:23
-1:09
23M
23.00 mi14:29:543:30:509:1012:11
9:44
+0:21
24M
24.00 mi14:39:163:40:129:119:22
9:22
-0:22
40K
24.85 mi14:47:283:48:249:118:12
9:35
+0:13
25.2M
25.20 mi14:51:083:52:049:133:40
10:38
+1:03
Finish
26.22 mi15:00:524:01:489:149:44
9:33
-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

8:35 /mi

Average Pace

9:14 /mi

Slowest Pace

10:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:27:07

36% of race

Time at Steady Pace

1:54:43

47% of race

Time at Slower Pace

39:58

17% of race

Average Pace: 9:13 /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 mi11:25:4426:408:3526:40
8:35
#20373
10K
6.21 mi11:52:4153:378:3826:57
8:40
#20554
15K
9.32 mi12:20:051:21:018:4227:24
8:49
#20720
20K
12.43 mi12:48:241:49:208:4828:19
9:07
#20925
Half
13.11 mi12:54:301:55:268:486:06
8:56
#20950
25K
15.53 mi13:16:422:17:388:5222:12
9:09
#20908
30K
18.64 mi13:46:352:47:318:5929:53
9:37
#20804
20M
20.00 mi14:00:103:01:069:0313:35
10:00
#20815
21M
21.00 mi14:10:423:11:389:0810:32
10:32
#20756
35K
21.75 mi14:17:433:18:399:087:01
9:23
#20731
23M
23.00 mi14:29:543:30:509:1012:11
9:44
#20677
24M
24.00 mi14:39:163:40:129:119:22
9:22
#20613
40K
24.85 mi14:47:283:48:249:118:12
9:35
#20577
25.2M
25.20 mi14:51:083:52:049:133:40
10:38
#20579
Finish
26.22 mi15:00:524:01:489:149:44
9:33
#20611
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi203737731773121127(Top 74%)8072(Top 66%)8072(Top 812%)
10K6.21 mi3.10 mi20554-1817802-717802-7120742(Top 73%)7884(Top 64%)7884(Top 793%)
15K9.32 mi3.11 mi20720-1667876-747876-7421127(Top 74%)8072(Top 66%)8072(Top 812%)
20K12.43 mi3.11 mi20925-2057990-1147990-11421516(Top 76%)8323(Top 68%)8323(Top 837%)
Half13.11 mi0.68 mi20950-258006-168006-1621592(Top 76%)8361(Top 68%)8361(Top 841%)
25K15.53 mi2.42 mi20908+427990+167990+1620598(Top 73%)7872(Top 64%)7872(Top 792%)
30K18.64 mi3.11 mi20804+1047990799020426(Top 72%)7889(Top 65%)7889(Top 794%)
20M20.00 mi1.36 mi20815-118003-138003-1320932(Top 74%)8322(Top 68%)8322(Top 837%)
21M21.00 mi1.00 mi20756+597987+167987+1620127(Top 71%)7982(Top 65%)7982(Top 803%)
35K21.75 mi0.75 mi20731+257988-17988-119898(Top 70%)7929(Top 65%)7929(Top 798%)
23M23.00 mi1.25 mi20677+547986+27986+219566(Top 69%)7819(Top 64%)7819(Top 787%)
24M24.00 mi1.00 mi20613+647970+167970+1619119(Top 67%)7612(Top 62%)7612(Top 766%)
40K24.85 mi0.85 mi20577+367967+37967+319080(Top 67%)7673(Top 63%)7673(Top 772%)
25.2M25.20 mi0.35 mi20579-27980-137980-1319536(Top 69%)7923(Top 65%)7923(Top 797%)
Finish26.22 mi1.02 mi20611-328005-258005-2521372(Top 75%)8843(Top 72%)8843(Top 890%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21stories
+97ft-345ft

Overall

21127

Females

8072

F55-59

8072

5K→10K

3.1 - 6.2 mi

Top 73%
×5stories
+79ft-138ft

Overall

20742

Females

7884

F55-59

7884

10K→15K

6.2 - 9.3 mi

Top 74%
×3stories
+67ft-78ft

Overall

21127

Females

8072

F55-59

8072

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

21516

Females

8323

F55-59

8323

20K→Half

12.4 - 13.1 mi

Top 76%
×2stories
+19ft-37ft

Overall

21592

Females

8361

F55-59

8361

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

20598

Females

7872

F55-59

7872

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

20426

Females

7889

F55-59

7889

30K→20M

18.6 - 20.0 mi

Top 74%
×5stories
+64ft-50ft

Overall

20932

Females

8322

F55-59

8322

20M→21M

20.0 - 21.0 mi

Top 71%
×8stories
+106ft-24ft

Overall

20127

Females

7982

F55-59

7982

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

19898

Females

7929

F55-59

7929

35K→23M

21.8 - 23.0 mi

Top 69%
×5stories
+23ft-63ft

Overall

19566

Females

7819

F55-59

7819

23M→24M

23.0 - 24.0 mi

Top 67%
×6stories
+12ft-82ft

Overall

19119

Females

7612

F55-59

7612

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

19080

Females

7673

F55-59

7673

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

19536

Females

7923

F55-59

7923

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2stories
+22ft-21ft

Overall

21372

Females

8843

F55-59

8843

Passing Analysis

Category:
Athletes Passed
1539
Passed By
1777
Net Change
-238
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20373
5K → 10K206387-181#20373#20554
10K → 15K136302-166#20554#20720
15K → 20K126331-205#20720#20925
20K → Half2550-25#20925#20950
Half → 25K162120+42#20950#20908
25K → 30K264160+104#20908#20804
30K → 20M97108-11#20804#20815
20M → 21M12364+59#20815#20756
21M → 35K6843+25#20756#20731
35K → 23M11258+54#20731#20677
23M → 24M9632+64#20677#20613
24M → 40K6933+36#20613#20577
40K → 25.2M2628-2#20577#20579
25.2M → Finish2961-32#20579#20611
TOTALS15391777-238
📊

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