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BOSTON MARATHON 2025

Erica Grzenda

Bib: 20919•F

SC

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 47%
Gender (Female)
#0 / 12228
Top 33%
Masters (Masters Women)
#0 / 6759
Top 18%
Division (F40-44)
#0 / 1718
Top 37%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:51
Rank: #16558
Start → 5K
24:51 | 8:00/mi
10K· 6.21 mi
49:29
Rank: #16200 (+358)
5K → 10K
24:38 | 7:56/mi
15K· 9.32 mi
1:14:12
Rank: #16007 (+193)
10K → 15K
24:43 | 7:57/mi
20K· 12.43 mi
1:38:55
Rank: #15629 (+378)
15K → 20K
24:43 | 7:57/mi
Half· 13.11 mi
1:44:18
Rank: #15592 (+37)
20K → Half
5:23 | 7:53/mi
25K· 15.53 mi
2:03:34
Rank: #15190 (+402)
Half → 25K
19:16 | 7:57/mi
30K· 18.64 mi
2:28:54
Rank: #14602 (+588)
25K → 30K
25:20 | 8:09/mi
20M
2:40:01
Rank: #14324 (+278)
30K → 20M
11:07 | 8:11/mi
21M
2:48:37
Rank: #14086 (+238)
20M → 21M
8:36 | 8:36/mi
35K· 21.75 mi
2:54:31
Rank: #13957 (+129)
21M → 35K
5:54 | 7:53/mi
23M
3:04:38
Rank: #13732 (+225)
35K → 23M
10:07 | 8:05/mi
24M
3:12:35
Rank: #13585 (+147)
23M → 24M
7:57 | 7:57/mi
40K· 24.85 mi
3:19:37
Rank: #13493 (+92)
24M → 40K
7:02 | 8:14/mi
25.2M
3:22:41
Rank: #13439 (+54)
40K → 25.2M
3:04 | 8:54/mi
Finish· 26.22 mi
3:30:51
Rank: #13432 (+7)
25.2M → Finish
8:10 | 8:01/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:44:18
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:46:33
Pace8:08 /mi
📊Positive Split: 2.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0824:518:0024:51
8:00
-
10K
6.21 mi11:42:4649:297:5824:38
7:56
-0:04
15K
9.32 mi12:07:291:14:127:5824:43
7:57
+0:01
20K
12.43 mi12:32:121:38:557:5824:43
7:57
0:00
Half
13.11 mi12:37:351:44:187:575:23
7:53
-0:04
25K
15.53 mi12:56:512:03:347:5719:16
7:57
+0:04
30K
18.64 mi13:22:112:28:547:5925:20
8:09
+0:12
20M
20.00 mi13:33:182:40:018:0011:07
8:11
+0:02
21M
21.00 mi13:41:542:48:378:028:36
8:36
+0:25
35K
21.75 mi13:47:482:54:318:015:54
7:53
-0:43
23M
23.00 mi13:57:553:04:388:0210:07
8:05
+0:12
24M
24.00 mi14:05:523:12:358:017:57
7:57
-0:08
40K
24.85 mi14:12:543:19:378:027:02
8:14
+0:17
25.2M
25.20 mi14:15:583:22:418:033:04
8:54
+0:40
Finish
26.22 mi14:24:083:30:518:038:10
8:01
-0:53

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

7:53 /mi

Average Pace

8:03 /mi

Slowest Pace

8:54 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:27:47

99% of race

Time at Steady Pace

3:04

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:02 /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 mi11:18:0824:518:0024:51
8:00
#16558
10K
6.21 mi11:42:4649:297:5824:38
7:56
#16200
15K
9.32 mi12:07:291:14:127:5824:43
7:57
#16007
20K
12.43 mi12:32:121:38:557:5824:43
7:57
#15629
Half
13.11 mi12:37:351:44:187:575:23
7:53
#15592
25K
15.53 mi12:56:512:03:347:5719:16
7:57
#15190
30K
18.64 mi13:22:112:28:547:5925:20
8:09
#14602
20M
20.00 mi13:33:182:40:018:0011:07
8:11
#14324
21M
21.00 mi13:41:542:48:378:028:36
8:36
#14086
35K
21.75 mi13:47:482:54:318:015:54
7:53
#13957
23M
23.00 mi13:57:553:04:388:0210:07
8:05
#13732
24M
24.00 mi14:05:523:12:358:017:57
7:57
#13585
40K
24.85 mi14:12:543:19:378:027:02
8:14
#13493
25.2M
25.20 mi14:15:583:22:418:033:04
8:54
#13439
Finish
26.22 mi14:24:083:30:518:038:10
8:01
#13432
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi165585494549415686(Top 55%)4965(Top 41%)4965(Top 289%)
10K6.21 mi3.10 mi16200+3585269+2255269+22515880(Top 56%)5061(Top 41%)5061(Top 295%)
15K9.32 mi3.11 mi16007+1935153+1165153+11615686(Top 55%)4965(Top 41%)4965(Top 289%)
20K12.43 mi3.11 mi15629+3784948+2054948+20514562(Top 51%)4405(Top 36%)4405(Top 256%)
Half13.11 mi0.68 mi15592+374927+214927+2114913(Top 53%)4590(Top 38%)4590(Top 267%)
25K15.53 mi2.42 mi15190+4024717+2104717+21013454(Top 47%)3920(Top 32%)3920(Top 228%)
30K18.64 mi3.11 mi14602+5884446+2714446+27112459(Top 44%)3544(Top 29%)3544(Top 206%)
20M20.00 mi1.36 mi14324+2784314+1324314+13211658(Top 41%)3280(Top 27%)3280(Top 191%)
21M21.00 mi1.00 mi14086+2384215+994215+9911044(Top 39%)3138(Top 26%)3138(Top 183%)
35K21.75 mi0.75 mi13957+1294165+504165+5011387(Top 40%)3336(Top 27%)3336(Top 194%)
23M23.00 mi1.25 mi13732+2254077+884077+8810566(Top 37%)3038(Top 25%)3038(Top 177%)
24M24.00 mi1.00 mi13585+1474027+504027+5010836(Top 38%)3235(Top 26%)3235(Top 188%)
40K24.85 mi0.85 mi13493+923993+343993+3411662(Top 41%)3753(Top 31%)3753(Top 218%)
25.2M25.20 mi0.35 mi13439+543980+133980+1311072(Top 39%)3561(Top 29%)3561(Top 207%)
Finish26.22 mi1.02 mi13432+74002-224002-2212931(Top 46%)4411(Top 36%)4411(Top 257%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

15686

Females

4965

F40-44

4965

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

15880

Females

5061

F40-44

5061

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

15686

Females

4965

F40-44

4965

15K→20K

9.3 - 12.4 mi

Top 51%
×5stories
+106ft-86ft

Overall

14562

Females

4405

F40-44

4405

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14913

Females

4590

F40-44

4590

Half→25K

13.1 - 15.5 mi

Top 47%
×4stories
+66ft-88ft

Overall

13454

Females

3920

F40-44

3920

25K→30K

15.5 - 18.6 mi

Top 44%
×9stories
+181ft-148ft

Overall

12459

Females

3544

F40-44

3544

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

11658

Females

3280

F40-44

3280

20M→21M

20.0 - 21.0 mi

Top 39%
×8stories
+106ft-24ft

Overall

11044

Females

3138

F40-44

3138

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11387

Females

3336

F40-44

3336

35K→23M

21.8 - 23.0 mi

Top 37%
×5stories
+23ft-63ft

Overall

10566

Females

3038

F40-44

3038

23M→24M

23.0 - 24.0 mi

Top 38%
×6stories
+12ft-82ft

Overall

10836

Females

3235

F40-44

3235

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11662

Females

3753

F40-44

3753

40K→25.2M

24.9 - 25.2 mi

Top 39%
×1story
+13ft-16ft

Overall

11072

Females

3561

F40-44

3561

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2stories
+22ft-21ft

Overall

12931

Females

4411

F40-44

4411

Passing Analysis

Category:
Athletes Passed
3678
Passed By
552
Net Change
+3126
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16558
5K → 10K499141+358#16558#16200
10K → 15K308115+193#16200#16007
15K → 20K42345+378#16007#15629
20K → Half5518+37#15629#15592
Half → 25K41513+402#15592#15190
25K → 30K61426+588#15190#14602
30K → 20M29214+278#14602#14324
20M → 21M25921+238#14324#14086
21M → 35K13910+129#14086#13957
35K → 23M23813+225#13957#13732
23M → 24M17023+147#13732#13585
24M → 40K12028+92#13585#13493
40K → 25.2M6814+54#13493#13439
25.2M → Finish7871+7#13439#13432
TOTALS3678552+3126
📊

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