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BOSTON MARATHON 2025

Grace Zablocki

Bib: 26705•F

MA

0:00
0:00
/ mi
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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
35:37
Rank: #27983
Start → 5K
35:37 | 11:28/mi
10K· 6.21 mi
1:14:40
Rank: #28148 (-165)
5K → 10K
39:03 | 12:34/mi
15K· 9.32 mi
1:54:36
Rank: #28148
10K → 15K
39:56 | 12:51/mi
20K· 12.43 mi
2:34:30
Rank: #28066 (+82)
15K → 20K
39:54 | 12:51/mi
Half· 13.11 mi
2:42:47
Rank: #28047 (+19)
20K → Half
8:17 | 12:08/mi
25K· 15.53 mi
3:17:04
Rank: #28063 (-16)
Half → 25K
34:17 | 14:08/mi
30K· 18.64 mi
3:57:54
Rank: #27911 (+152)
25K → 30K
40:50 | 13:09/mi
20M
4:16:33
Rank: #27874 (+37)
30K → 20M
18:39 | 13:43/mi
21M
4:31:53
Rank: #27873 (+1)
20M → 21M
15:20 | 15:20/mi
35K· 21.75 mi
4:40:51
Rank: #27817 (+56)
21M → 35K
8:58 | 11:59/mi
23M
4:56:05
Rank: #27738 (+79)
35K → 23M
15:14 | 12:10/mi
24M
5:09:11
Rank: #27712 (+26)
23M → 24M
13:06 | 13:06/mi
40K· 24.85 mi
5:20:18
Rank: #27681 (+31)
24M → 40K
11:07 | 13:00/mi
25.2M
5:25:00
Rank: #27664 (+17)
40K → 25.2M
4:42 | 13:38/mi
Finish· 26.22 mi
5:37:44
Rank: #27657 (+7)
25.2M → Finish
12:44 | 12:30/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:42:47
Pace12:25 /mi
2nd Half
Distance13.11 mi
Time2:54:57
Pace13:21 /mi
📊Positive Split: 7.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:0935:3711:2835:37
11:28
-
10K
6.21 mi12:31:121:14:4012:0139:03
12:34
+1:06
15K
9.32 mi13:11:081:54:3612:1839:56
12:51
+0:17
20K
12.43 mi13:51:022:34:3012:2639:54
12:51
0:00
Half
13.11 mi13:59:192:42:4712:258:17
12:08
-0:43
25K
15.53 mi14:33:363:17:0412:4134:17
14:08
+2:00
30K
18.64 mi15:14:263:57:5412:4640:50
13:09
-0:59
20M
20.00 mi15:33:054:16:3312:5018:39
13:43
+0:34
21M
21.00 mi15:48:254:31:5312:5715:20
15:20
+1:37
35K
21.75 mi15:57:234:40:5112:558:58
11:59
-3:21
23M
23.00 mi16:12:374:56:0512:5215:14
12:10
+0:11
24M
24.00 mi16:25:435:09:1112:5313:06
13:06
+0:56
40K
24.85 mi16:36:505:20:1812:5311:07
13:00
-0:06
25.2M
25.20 mi16:41:325:25:0012:544:42
13:38
+0:38
Finish
26.22 mi16:54:165:37:4412:5312:44
12:30
-1:08

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

11:28 /mi

Average Pace

12:53 /mi

Slowest Pace

15:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:08:06

20% of race

Time at Steady Pace

3:16:40

58% of race

Time at Slower Pace

1:12:58

22% of race

Average Pace: 12:53 /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 mi11:52:0935:3711:2835:37
11:28
#27983
10K
6.21 mi12:31:121:14:4012:0139:03
12:34
#28148
15K
9.32 mi13:11:081:54:3612:1839:56
12:51
#28148
20K
12.43 mi13:51:022:34:3012:2639:54
12:51
#28066
Half
13.11 mi13:59:192:42:4712:258:17
12:08
#28047
25K
15.53 mi14:33:363:17:0412:4134:17
14:08
#28063
30K
18.64 mi15:14:263:57:5412:4640:50
13:09
#27911
20M
20.00 mi15:33:054:16:3312:5018:39
13:43
#27874
21M
21.00 mi15:48:254:31:5312:5715:20
15:20
#27873
35K
21.75 mi15:57:234:40:5112:558:58
11:59
#27817
23M
23.00 mi16:12:374:56:0512:5215:14
12:10
#27738
24M
24.00 mi16:25:435:09:1112:5313:06
13:06
#27712
40K
24.85 mi16:36:505:20:1812:5311:07
13:00
#27681
25.2M
25.20 mi16:41:325:25:0012:544:42
13:38
#27664
Finish
26.22 mi16:54:165:37:4412:5312:44
12:30
#27657
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi27983119521195228112(Top 99%)12051(Top 99%)12051(Top 220%)
10K6.21 mi3.10 mi28148-16512063-11112063-11128220(Top 99%)12115(Top 99%)12115(Top 222%)
15K9.32 mi3.11 mi2814812064-112064-128112(Top 99%)12051(Top 99%)12051(Top 220%)
20K12.43 mi3.11 mi28066+8212018+4612018+4627730(Top 98%)11827(Top 97%)11827(Top 216%)
Half13.11 mi0.68 mi28047+1912006+1212006+1227545(Top 97%)11738(Top 96%)11738(Top 215%)
25K15.53 mi2.42 mi28063-1612013-712013-727953(Top 98%)11983(Top 98%)11983(Top 219%)
30K18.64 mi3.11 mi27911+15211933+8011933+8026819(Top 94%)11395(Top 93%)11395(Top 208%)
20M20.00 mi1.36 mi27874+3711919+1411919+1427092(Top 95%)11612(Top 95%)11612(Top 212%)
21M21.00 mi1.00 mi27873+111925-611925-627399(Top 96%)11773(Top 96%)11773(Top 215%)
35K21.75 mi0.75 mi27817+5611898+2711898+2725833(Top 91%)11020(Top 90%)11020(Top 201%)
23M23.00 mi1.25 mi27738+7911854+4411854+4425347(Top 89%)10779(Top 88%)10779(Top 197%)
24M24.00 mi1.00 mi27712+2611846+811846+826954(Top 95%)11611(Top 95%)11611(Top 212%)
40K24.85 mi0.85 mi27681+3111838+811838+826293(Top 93%)11291(Top 92%)11291(Top 206%)
25.2M25.20 mi0.35 mi27664+1711833+511833+525823(Top 91%)11106(Top 91%)11106(Top 203%)
Finish26.22 mi1.02 mi27657+711834-111834-127281(Top 96%)11761(Top 96%)11761(Top 215%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21stories
+97ft-345ft

Overall

28112

Females

12051

F18-39

12051

5K→10K

3.1 - 6.2 mi

Top 99%
×5stories
+79ft-138ft

Overall

28220

Females

12115

F18-39

12115

10K→15K

6.2 - 9.3 mi

Top 99%
×3stories
+67ft-78ft

Overall

28112

Females

12051

F18-39

12051

15K→20K

9.3 - 12.4 mi

Top 98%
×5stories
+106ft-86ft

Overall

27730

Females

11827

F18-39

11827

20K→Half

12.4 - 13.1 mi

Top 97%
×2stories
+19ft-37ft

Overall

27545

Females

11738

F18-39

11738

Half→25K

13.1 - 15.5 mi

Top 98%
×4stories
+66ft-88ft

Overall

27953

Females

11983

F18-39

11983

25K→30K

15.5 - 18.6 mi

Top 94%
×9stories
+181ft-148ft

Overall

26819

Females

11395

F18-39

11395

30K→20M

18.6 - 20.0 mi

Top 95%
×5stories
+64ft-50ft

Overall

27092

Females

11612

F18-39

11612

20M→21M

20.0 - 21.0 mi

Top 96%
×8stories
+106ft-24ft

Overall

27399

Females

11773

F18-39

11773

21M→35K

21.0 - 21.8 mi

Top 91%
×7stories
+17ft-86ft

Overall

25833

Females

11020

F18-39

11020

35K→23M

21.8 - 23.0 mi

Top 89%
×5stories
+23ft-63ft

Overall

25347

Females

10779

F18-39

10779

23M→24M

23.0 - 24.0 mi

Top 95%
×6stories
+12ft-82ft

Overall

26954

Females

11611

F18-39

11611

24M→40K

24.0 - 24.9 mi

Top 93%
×1story
+6ft-20ft

Overall

26293

Females

11291

F18-39

11291

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25823

Females

11106

F18-39

11106

25.2M→Finish

25.2 - 26.2 mi

Top 96%
×2stories
+22ft-21ft

Overall

27281

Females

11761

F18-39

11761

Passing Analysis

Category:
Athletes Passed
650
Passed By
324
Net Change
+326
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27983
5K → 10K19184-165#27983#28148
10K → 15K31310#28148#28148
15K → 20K9311+82#28148#28066
20K → Half212+19#28066#28047
Half → 25K3147-16#28047#28063
25K → 30K1531+152#28063#27911
30K → 20M436+37#27911#27874
20M → 21M1716+1#27874#27873
21M → 35K560+56#27873#27817
35K → 23M801+79#27817#27738
23M → 24M337+26#27738#27712
24M → 40K376+31#27712#27681
40K → 25.2M192+17#27681#27664
25.2M → Finish1710+7#27664#27657
TOTALS650324+326
📊

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