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BOSTON MARATHON 2025

Heather Glynn

Bib: 21402•F

IL

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:57
Rank: #16849
Start → 5K
24:57 | 8:02/mi
10K· 6.21 mi
50:38
Rank: #17634 (-785)
5K → 10K
25:41 | 8:16/mi
15K· 9.32 mi
1:16:38
Rank: #17912 (-278)
10K → 15K
26:00 | 8:22/mi
20K· 12.43 mi
1:43:40
Rank: #18265 (-353)
15K → 20K
27:02 | 8:42/mi
Half· 13.11 mi
1:49:30
Rank: #18324 (-59)
20K → Half
5:50 | 8:33/mi
25K· 15.53 mi
2:12:32
Rank: #19110 (-786)
Half → 25K
23:02 | 9:30/mi
30K· 18.64 mi
2:45:36
Rank: #20303 (-1193)
25K → 30K
33:04 | 10:39/mi
20M
3:00:12
Rank: #20610 (-307)
30K → 20M
14:36 | 10:45/mi
21M
3:12:44
Rank: #21012 (-402)
20M → 21M
12:32 | 12:32/mi
35K· 21.75 mi
3:20:15
Rank: #21070 (-58)
21M → 35K
7:31 | 10:03/mi
23M
3:33:27
Rank: #21143 (-73)
35K → 23M
13:12 | 10:33/mi
24M
3:42:54
Rank: #21066 (+77)
23M → 24M
9:27 | 9:27/mi
40K· 24.85 mi
3:52:03
Rank: #21148 (-82)
24M → 40K
9:09 | 10:42/mi
25.2M
3:55:57
Rank: #21147 (+1)
40K → 25.2M
3:54 | 11:19/mi
Finish· 26.22 mi
4:05:45
Rank: #21161 (-14)
25.2M → Finish
9:48 | 9:37/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:30
Pace8:21 /mi
2nd Half
Distance13.11 mi
Time2:16:15
Pace10:24 /mi
📊Positive Split: 24.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:4624:578:0224:57
8:02
-
10K
6.21 mi11:46:2750:388:0925:41
8:16
+0:14
15K
9.32 mi12:12:271:16:388:1326:00
8:22
+0:06
20K
12.43 mi12:39:291:43:408:2127:02
8:42
+0:20
Half
13.11 mi12:45:191:49:308:215:50
8:33
-0:09
25K
15.53 mi13:08:212:12:328:3223:02
9:30
+0:57
30K
18.64 mi13:41:252:45:368:5333:04
10:39
+1:09
20M
20.00 mi13:56:013:00:129:0114:36
10:45
+0:06
21M
21.00 mi14:08:333:12:449:1112:32
12:32
+1:47
35K
21.75 mi14:16:043:20:159:127:31
10:03
-2:29
23M
23.00 mi14:29:163:33:279:1713:12
10:33
+0:30
24M
24.00 mi14:38:433:42:549:179:27
9:27
-1:06
40K
24.85 mi14:47:523:52:039:209:09
10:42
+1:15
25.2M
25.20 mi14:51:463:55:579:223:54
11:19
+0:37
Finish
26.22 mi15:01:344:05:459:239:48
9:37
-1:42

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

8:02 /mi

Average Pace

9:23 /mi

Slowest Pace

12:32 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:49:30

45% of race

Time at Steady Pace

49:48

20% of race

Time at Slower Pace

1:26:27

35% of race

Average Pace: 9:22 /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 mi11:20:4624:578:0224:57
8:02
#16849
10K
6.21 mi11:46:2750:388:0925:41
8:16
#17634
15K
9.32 mi12:12:271:16:388:1326:00
8:22
#17912
20K
12.43 mi12:39:291:43:408:2127:02
8:42
#18265
Half
13.11 mi12:45:191:49:308:215:50
8:33
#18324
25K
15.53 mi13:08:212:12:328:3223:02
9:30
#19110
30K
18.64 mi13:41:252:45:368:5333:04
10:39
#20303
20M
20.00 mi13:56:013:00:129:0114:36
10:45
#20610
21M
21.00 mi14:08:333:12:449:1112:32
12:32
#21012
35K
21.75 mi14:16:043:20:159:127:31
10:03
#21070
23M
23.00 mi14:29:163:33:279:1713:12
10:33
#21143
24M
24.00 mi14:38:433:42:549:179:27
9:27
#21066
40K
24.85 mi14:47:523:52:039:209:09
10:42
#21148
25.2M
25.20 mi14:51:463:55:579:223:54
11:19
#21147
Finish
26.22 mi15:01:344:05:459:239:48
9:37
#21161
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi168495658565818523(Top 65%)6622(Top 54%)6622(Top 365%)
10K6.21 mi3.10 mi17634-7856116-4586116-45818354(Top 65%)6520(Top 53%)6520(Top 360%)
15K9.32 mi3.11 mi17912-2786274-1586274-15818523(Top 65%)6622(Top 54%)6622(Top 365%)
20K12.43 mi3.11 mi18265-3536493-2196493-21919433(Top 68%)7163(Top 59%)7163(Top 395%)
Half13.11 mi0.68 mi18324-596529-366529-3619601(Top 69%)7257(Top 59%)7257(Top 400%)
25K15.53 mi2.42 mi19110-7866977-4486977-44821866(Top 77%)8578(Top 70%)8578(Top 473%)
30K18.64 mi3.11 mi20303-11937702-7257702-72523262(Top 82%)9470(Top 77%)9470(Top 522%)
20M20.00 mi1.36 mi20610-3077894-1927894-19223061(Top 81%)9451(Top 77%)9451(Top 521%)
21M21.00 mi1.00 mi21012-4028127-2338127-23324443(Top 86%)10259(Top 84%)10259(Top 566%)
35K21.75 mi0.75 mi21070-588173-468173-4622046(Top 78%)9054(Top 74%)9054(Top 499%)
23M23.00 mi1.25 mi21143-738239-668239-6622135(Top 78%)9137(Top 75%)9137(Top 504%)
24M24.00 mi1.00 mi21066+778228+118228+1119461(Top 69%)7811(Top 64%)7811(Top 431%)
40K24.85 mi0.85 mi21148-828283-558283-5522462(Top 79%)9440(Top 77%)9440(Top 521%)
25.2M25.20 mi0.35 mi21147+18288-58288-521571(Top 76%)8940(Top 73%)8940(Top 493%)
Finish26.22 mi1.02 mi21161-148315-278315-2721623(Top 76%)8970(Top 73%)8970(Top 495%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

18523

Females

6622

F45-49

6622

5K→10K

3.1 - 6.2 mi

Top 65%
×5stories
+79ft-138ft

Overall

18354

Females

6520

F45-49

6520

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

18523

Females

6622

F45-49

6622

15K→20K

9.3 - 12.4 mi

Top 68%
×5stories
+106ft-86ft

Overall

19433

Females

7163

F45-49

7163

20K→Half

12.4 - 13.1 mi

Top 69%
×2stories
+19ft-37ft

Overall

19601

Females

7257

F45-49

7257

Half→25K

13.1 - 15.5 mi

Top 77%
×4stories
+66ft-88ft

Overall

21866

Females

8578

F45-49

8578

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

23262

Females

9470

F45-49

9470

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

23061

Females

9451

F45-49

9451

20M→21M

20.0 - 21.0 mi

Top 86%
×8stories
+106ft-24ft

Overall

24443

Females

10259

F45-49

10259

21M→35K

21.0 - 21.8 mi

Top 78%
×7stories
+17ft-86ft

Overall

22046

Females

9054

F45-49

9054

35K→23M

21.8 - 23.0 mi

Top 78%
×5stories
+23ft-63ft

Overall

22135

Females

9137

F45-49

9137

23M→24M

23.0 - 24.0 mi

Top 69%
×6stories
+12ft-82ft

Overall

19461

Females

7811

F45-49

7811

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

22462

Females

9440

F45-49

9440

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21571

Females

8940

F45-49

8940

25.2M→Finish

25.2 - 26.2 mi

Top 76%
×2stories
+22ft-21ft

Overall

21623

Females

8970

F45-49

8970

Passing Analysis

Category:
Athletes Passed
746
Passed By
5058
Net Change
-4312
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16849
5K → 10K85870-785#16849#17634
10K → 15K109387-278#17634#17912
15K → 20K95448-353#17912#18265
20K → Half1978-59#18265#18324
Half → 25K38824-786#18324#19110
25K → 30K351228-1193#19110#20303
30K → 20M38345-307#20303#20610
20M → 21M19421-402#20610#21012
21M → 35K46104-58#21012#21070
35K → 23M66139-73#21070#21143
23M → 24M10326+77#21143#21066
24M → 40K24106-82#21066#21148
40K → 25.2M2827+1#21148#21147
25.2M → Finish4155-14#21147#21161
TOTALS7465058-4312
📊

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