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BOSTON MARATHON 2025

Gretchen Gandini

Bib: 21826•F

NH

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
24:35
Rank: #15848
Start → 5K
7:55/mi
24:35 split
10K· 6.21 mi
49:37
Rank: #16395 (-547)
5K → 10K
8:03/mi
25:02 split
15K· 9.32 mi
1:15:15
Rank: #16889 (-494)
10K → 15K
8:15/mi
25:38 split
20K· 12.43 mi
1:42:34
Rank: #17714 (-825)
15K → 20K
8:48/mi
27:19 split
Half· 13.11 mi
1:48:33
Rank: #17864 (-150)
20K → Half
8:46/mi
5:59 split
25K· 15.53 mi
2:12:14
Rank: #18976 (-1112)
Half → 25K
9:46/mi
23:41 split
30K· 18.64 mi
2:47:03
Rank: #20691 (-1715)
25K → 30K
11:12/mi
34:49 split
20M
3:03:07
Rank: #21273 (-582)
30K → 20M
11:49/mi
16:04 split
21M
3:14:57
Rank: #21463 (-190)
20M → 21M
11:50/mi
11:50 split
35K· 21.75 mi
3:23:56
Rank: #21755 (-292)
21M → 35K
12:00/mi
8:59 split
23M
3:36:07
Rank: #21611 (+144)
35K → 23M
9:44/mi
12:11 split
24M
3:46:25
Rank: #21635 (-24)
23M → 24M
10:18/mi
10:18 split
40K· 24.85 mi
3:55:04
Rank: #21587 (+48)
24M → 40K
10:07/mi
8:39 split
25.2M
3:58:54
Rank: #21582 (+5)
40K → 25.2M
11:07/mi
3:50 split
Finish· 26.22 mi
4:08:14
Rank: #21507 (+75)
25.2M → Finish
9:10/mi
9:20 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:48:33
Pace8:17 /mi
2nd Half
Distance13.11 mi
Time2:19:41
Pace10:39 /mi
📊Positive Split: 28.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:4724:357:5524:35
7:55
-
10K
6.21 mi11:44:4949:377:5925:02
8:03
+0:08
15K
9.32 mi12:10:271:15:158:0425:38
8:15
+0:12
20K
12.43 mi12:37:461:42:348:1527:19
8:48
+0:33
Half
13.11 mi12:43:451:48:338:175:59
8:46
-0:02
25K
15.53 mi13:07:262:12:148:3123:41
9:46
+1:00
30K
18.64 mi13:42:152:47:038:5834:49
11:12
+1:26
20M
20.00 mi13:58:193:03:079:0916:04
11:49
+0:37
21M
21.00 mi14:10:093:14:579:1711:50
11:50
+0:01
35K
21.75 mi14:19:083:23:569:238:59
12:00
+0:10
23M
23.00 mi14:31:193:36:079:2412:11
9:44
-2:16
24M
24.00 mi14:41:373:46:259:2610:18
10:18
+0:34
40K
24.85 mi14:50:163:55:049:278:39
10:07
-0:11
25.2M
25.20 mi14:54:063:58:549:293:50
11:07
+1:00
Finish
26.22 mi15:03:264:08:149:289:20
9:10
-1:57

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

7:55 /mi

Average Pace

9:28 /mi

Slowest Pace

12:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:33

44% of race

Time at Steady Pace

1:04:09

26% of race

Time at Slower Pace

1:15:32

30% of race

Average Pace: 9:28 /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 mi11:19:4724:357:5524:35
7:55
#15848
10K
6.21 mi11:44:4949:377:5925:02
8:03
#16395
15K
9.32 mi12:10:271:15:158:0425:38
8:15
#16889
20K
12.43 mi12:37:461:42:348:1527:19
8:48
#17714
Half
13.11 mi12:43:451:48:338:175:59
8:46
#17864
25K
15.53 mi13:07:262:12:148:3123:41
9:46
#18976
30K
18.64 mi13:42:152:47:038:5834:49
11:12
#20691
20M
20.00 mi13:58:193:03:079:0916:04
11:49
#21273
21M
21.00 mi14:10:093:14:579:1711:50
11:50
#21463
35K
21.75 mi14:19:083:23:569:238:59
12:00
#21755
23M
23.00 mi14:31:193:36:079:2412:11
9:44
#21611
24M
24.00 mi14:41:373:46:259:2610:18
10:18
#21635
40K
24.85 mi14:50:163:55:049:278:39
10:07
#21587
25.2M
25.20 mi14:54:063:58:549:293:50
11:07
#21582
Finish
26.22 mi15:03:264:08:149:289:20
9:10
#21507
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi158485057505717762(Top 63%)6180(Top 51%)6180(Top 341%)
10K6.21 mi3.10 mi16395-5475382-3255382-32516914(Top 60%)5659(Top 46%)5659(Top 312%)
15K9.32 mi3.11 mi16889-4945658-2765658-27617762(Top 63%)6180(Top 51%)6180(Top 341%)
20K12.43 mi3.11 mi17714-8256166-5086166-50819912(Top 70%)7435(Top 61%)7435(Top 410%)
Half13.11 mi0.68 mi17864-1506266-1006266-10020830(Top 73%)7956(Top 65%)7956(Top 439%)
25K15.53 mi2.42 mi18976-11126904-6386904-63822695(Top 80%)9028(Top 74%)9028(Top 498%)
30K18.64 mi3.11 mi20691-17157921-10177921-101724389(Top 86%)10070(Top 82%)10070(Top 555%)
20M20.00 mi1.36 mi21273-5828258-3378258-33725016(Top 88%)10479(Top 86%)10479(Top 578%)
21M21.00 mi1.00 mi21463-1908369-1118369-11123284(Top 82%)9646(Top 79%)9646(Top 532%)
35K21.75 mi0.75 mi21755-2928543-1748543-17425878(Top 91%)11036(Top 90%)11036(Top 609%)
23M23.00 mi1.25 mi21611+1448495+488495+4819569(Top 69%)7822(Top 64%)7822(Top 431%)
24M24.00 mi1.00 mi21635-248531-368531-3622253(Top 78%)9260(Top 76%)9260(Top 511%)
40K24.85 mi0.85 mi21587+488525+68525+620853(Top 73%)8588(Top 70%)8588(Top 474%)
25.2M25.20 mi0.35 mi21582+58532-78532-721026(Top 74%)8670(Top 71%)8670(Top 478%)
Finish26.22 mi1.02 mi21507+758502+308502+3019802(Top 70%)8041(Top 66%)8041(Top 444%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 63%
×21story building
+97ft-345ft

Overall

17762

Females

6180

F45-49

6180

5K→10K

3.1 - 6.2 mi

Top 60%
×5story building
+79ft-138ft

Overall

16914

Females

5659

F45-49

5659

10K→15K

6.2 - 9.3 mi

Top 63%
×3story building
+67ft-78ft

Overall

17762

Females

6180

F45-49

6180

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

19912

Females

7435

F45-49

7435

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

20830

Females

7956

F45-49

7956

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

22695

Females

9028

F45-49

9028

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

24389

Females

10070

F45-49

10070

30K→20M

18.6 - 20.0 mi

Top 88%
×5story building
+64ft-50ft

Overall

25016

Females

10479

F45-49

10479

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23284

Females

9646

F45-49

9646

21M→35K

21.0 - 21.8 mi

Top 91%
×7story building
+17ft-86ft

Overall

25878

Females

11036

F45-49

11036

35K→23M

21.8 - 23.0 mi

Top 69%
×5story building
+23ft-63ft

Overall

19569

Females

7822

F45-49

7822

23M→24M

23.0 - 24.0 mi

Top 78%
×6story building
+12ft-82ft

Overall

22253

Females

9260

F45-49

9260

24M→40K

24.0 - 24.9 mi

Top 73%
×1story
+6ft-20ft

Overall

20853

Females

8588

F45-49

8588

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

21026

Females

8670

F45-49

8670

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19802

Females

8041

F45-49

8041

Passing Analysis

Category:
Athletes Passed
803
Passed By
6462
Net Change
-5659
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15848
5K → 10K148695-547#15848#16395
10K → 15K95589-494#16395#16889
15K → 20K50875-825#16889#17714
20K → Half10160-150#17714#17864
Half → 25K201132-1112#17864#18976
25K → 30K231738-1715#18976#20691
30K → 20M20602-582#20691#21273
20M → 21M32222-190#21273#21463
21M → 35K7299-292#21463#21755
35K → 23M15814+144#21755#21611
23M → 24M4367-24#21611#21635
24M → 40K8032+48#21635#21587
40K → 25.2M2621+5#21587#21582
25.2M → Finish9116+75#21582#21507
TOTALS8036462-5659
📊

Passing Visuals

Category:
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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