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BOSTON MARATHON 2025

Becky Grindstaff

Bib: 20123•F

TN

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 44%
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:14
Rank: #17530
Start → 5K
25:14 | 8:07/mi
10K· 6.21 mi
50:47
Rank: #17795 (-265)
5K → 10K
25:33 | 8:13/mi
15K· 9.32 mi
1:16:37
Rank: #17893 (-98)
10K → 15K
25:50 | 8:19/mi
20K· 12.43 mi
1:43:30
Rank: #18185 (-292)
15K → 20K
26:53 | 8:39/mi
Half· 13.11 mi
1:49:03
Rank: #18085 (+100)
20K → Half
5:33 | 8:08/mi
25K· 15.53 mi
2:09:44
Rank: #17938 (+147)
Half → 25K
20:41 | 8:32/mi
30K· 18.64 mi
2:37:30
Rank: #17784 (+154)
25K → 30K
27:46 | 8:56/mi
20M
2:49:41
Rank: #17671 (+113)
30K → 20M
12:11 | 8:58/mi
21M
2:59:21
Rank: #17629 (+42)
20M → 21M
9:40 | 9:40/mi
35K· 21.75 mi
3:06:09
Rank: #17666 (-37)
21M → 35K
6:48 | 9:05/mi
23M
3:18:05
Rank: #17740 (-74)
35K → 23M
11:56 | 9:32/mi
24M
3:27:29
Rank: #17801 (-61)
23M → 24M
9:24 | 9:24/mi
40K· 24.85 mi
3:35:39
Rank: #17866 (-65)
24M → 40K
8:10 | 9:33/mi
25.2M
3:39:09
Rank: #17874 (-8)
40K → 25.2M
3:30 | 10:09/mi
Finish· 26.22 mi
3:48:19
Rank: #17916 (-42)
25.2M → Finish
9:10 | 9:00/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:03
Pace8:19 /mi
2nd Half
Distance13.11 mi
Time1:59:16
Pace9:06 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:1725:148:0725:14
8:07
-
10K
6.21 mi11:44:5050:478:1025:33
8:13
+0:06
15K
9.32 mi12:10:401:16:378:1325:50
8:19
+0:06
20K
12.43 mi12:37:331:43:308:2026:53
8:39
+0:20
Half
13.11 mi12:43:061:49:038:195:33
8:08
-0:31
25K
15.53 mi13:03:472:09:448:2120:41
8:32
+0:24
30K
18.64 mi13:31:332:37:308:2727:46
8:56
+0:24
20M
20.00 mi13:43:442:49:418:2912:11
8:58
+0:02
21M
21.00 mi13:53:242:59:218:329:40
9:40
+0:42
35K
21.75 mi14:00:123:06:098:346:48
9:05
-0:35
23M
23.00 mi14:12:083:18:058:3711:56
9:32
+0:27
24M
24.00 mi14:21:323:27:298:399:24
9:24
-0:08
40K
24.85 mi14:29:423:35:398:418:10
9:33
+0:09
25.2M
25.20 mi14:33:123:39:098:423:30
10:09
+0:36
Finish
26.22 mi14:42:223:48:198:439:10
9:00
-1:09

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

8:07 /mi

Average Pace

8:43 /mi

Slowest Pace

10:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:44

57% of race

Time at Steady Pace

55:55

24% of race

Time at Slower Pace

42:40

19% of race

Average Pace: 8:42 /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 mi11:19:1725:148:0725:14
8:07
#17530
10K
6.21 mi11:44:5050:478:1025:33
8:13
#17795
15K
9.32 mi12:10:401:16:378:1325:50
8:19
#17893
20K
12.43 mi12:37:331:43:308:2026:53
8:39
#18185
Half
13.11 mi12:43:061:49:038:195:33
8:08
#18085
25K
15.53 mi13:03:472:09:448:2120:41
8:32
#17938
30K
18.64 mi13:31:332:37:308:2727:46
8:56
#17784
20M
20.00 mi13:43:442:49:418:2912:11
8:58
#17671
21M
21.00 mi13:53:242:59:218:329:40
9:40
#17629
35K
21.75 mi14:00:123:06:098:346:48
9:05
#17666
23M
23.00 mi14:12:083:18:058:3711:56
9:32
#17740
24M
24.00 mi14:21:323:27:298:399:24
9:24
#17801
40K
24.85 mi14:29:423:35:398:418:10
9:33
#17866
25.2M
25.20 mi14:33:123:39:098:423:30
10:09
#17874
Finish
26.22 mi14:42:223:48:198:439:10
9:00
#17916
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi175306049604918172(Top 64%)6424(Top 53%)6424(Top 374%)
10K6.21 mi3.10 mi17795-2656205-1566205-15618077(Top 64%)6346(Top 52%)6346(Top 369%)
15K9.32 mi3.11 mi17893-986264-596264-5918172(Top 64%)6424(Top 53%)6424(Top 374%)
20K12.43 mi3.11 mi18185-2926447-1836447-18319172(Top 67%)7005(Top 57%)7005(Top 408%)
Half13.11 mi0.68 mi18085+1006389+586389+5816941(Top 60%)5744(Top 47%)5744(Top 334%)
25K15.53 mi2.42 mi17938+1476321+686321+6817387(Top 61%)6076(Top 50%)6076(Top 354%)
30K18.64 mi3.11 mi17784+1546276+456276+4517359(Top 61%)6224(Top 51%)6224(Top 362%)
20M20.00 mi1.36 mi17671+1136248+286248+2816638(Top 59%)5946(Top 49%)5946(Top 346%)
21M21.00 mi1.00 mi17629+426232+166232+1616896(Top 59%)6206(Top 51%)6206(Top 361%)
35K21.75 mi0.75 mi17666-376272-406272-4018677(Top 66%)7285(Top 60%)7285(Top 424%)
23M23.00 mi1.25 mi17740-746352-806352-8018847(Top 66%)7426(Top 61%)7426(Top 432%)
24M24.00 mi1.00 mi17801-616426-746426-7419238(Top 68%)7666(Top 63%)7666(Top 446%)
40K24.85 mi0.85 mi17866-656470-446470-4418919(Top 67%)7589(Top 62%)7589(Top 442%)
25.2M25.20 mi0.35 mi17874-86486-166486-1617725(Top 62%)6977(Top 57%)6977(Top 406%)
Finish26.22 mi1.02 mi17916-426521-356521-3519033(Top 67%)7612(Top 62%)7612(Top 443%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21stories
+97ft-345ft

Overall

18172

Females

6424

F40-44

6424

5K→10K

3.1 - 6.2 mi

Top 64%
×5stories
+79ft-138ft

Overall

18077

Females

6346

F40-44

6346

10K→15K

6.2 - 9.3 mi

Top 64%
×3stories
+67ft-78ft

Overall

18172

Females

6424

F40-44

6424

15K→20K

9.3 - 12.4 mi

Top 67%
×5stories
+106ft-86ft

Overall

19172

Females

7005

F40-44

7005

20K→Half

12.4 - 13.1 mi

Top 60%
×2stories
+19ft-37ft

Overall

16941

Females

5744

F40-44

5744

Half→25K

13.1 - 15.5 mi

Top 61%
×4stories
+66ft-88ft

Overall

17387

Females

6076

F40-44

6076

25K→30K

15.5 - 18.6 mi

Top 61%
×9stories
+181ft-148ft

Overall

17359

Females

6224

F40-44

6224

30K→20M

18.6 - 20.0 mi

Top 59%
×5stories
+64ft-50ft

Overall

16638

Females

5946

F40-44

5946

20M→21M

20.0 - 21.0 mi

Top 59%
×8stories
+106ft-24ft

Overall

16896

Females

6206

F40-44

6206

21M→35K

21.0 - 21.8 mi

Top 66%
×7stories
+17ft-86ft

Overall

18677

Females

7285

F40-44

7285

35K→23M

21.8 - 23.0 mi

Top 66%
×5stories
+23ft-63ft

Overall

18847

Females

7426

F40-44

7426

23M→24M

23.0 - 24.0 mi

Top 68%
×6stories
+12ft-82ft

Overall

19238

Females

7666

F40-44

7666

24M→40K

24.0 - 24.9 mi

Top 67%
×1story
+6ft-20ft

Overall

18919

Females

7589

F40-44

7589

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17725

Females

6977

F40-44

6977

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2stories
+22ft-21ft

Overall

19033

Females

7612

F40-44

7612

Passing Analysis

Category:
Athletes Passed
1696
Passed By
2082
Net Change
-386
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17530
5K → 10K176441-265#17530#17795
10K → 15K164262-98#17795#17893
15K → 20K100392-292#17893#18185
20K → Half1044+100#18185#18085
Half → 25K23386+147#18085#17938
25K → 30K301147+154#17938#17784
30K → 20M17461+113#17784#17671
20M → 21M12078+42#17671#17629
21M → 35K5188-37#17629#17666
35K → 23M92166-74#17666#17740
23M → 24M62123-61#17740#17801
24M → 40K36101-65#17801#17866
40K → 25.2M2937-8#17866#17874
25.2M → Finish5496-42#17874#17916
TOTALS16962082-386
📊

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