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BOSTON MARATHON 2025

Laura Zimmer

CA

Bib: 7820 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 11%
Gender (Female)
#0 / 12228
Top 1%
Division (F18-39)
#0 / 5469
Top 3%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
6:52/mi
21:19
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:42/mi
42:08
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
6:46/mi
1:03:09
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
6:43/mi
1:24:00
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
6:39/mi
1:28:32
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
6:40/mi
1:44:42
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
6:46/mi
2:05:42
↑ 181↓ 1480.2%
138 ft elev
20M
6:40/mi
2:14:45
↑ 64↓ 500.2%
148 ft elev
21M
6:53/mi
2:21:38
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
6:16/mi
2:26:19
↑ 17↓ 861.7%
156 ft elev
23M
6:32/mi
2:34:30
↑ 23↓ 630.6%
116 ft elev
24M
6:12/mi
2:40:42
↓ 821.3%
34 ft elev
40K· 24.85 mi
6:17/mi
2:46:04
↓ 200.3%
20 ft elev
25.2M
6:49/mi
2:48:25
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:08/mi
2:54:40
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:28:326:45 /mi+2.7%
2nd Half
1:26:086:34 /mi✓ faster
Negative split — 2.7% faster in the second half
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Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointTimeAvg PaceSegment LengthSegment TimeSegment PaceTrendDiff
5K
21:196:523.11 mi21:19
6:52
-
10K
42:086:473.10 mi20:49
6:42
-0:10
15K
1:03:096:473.11 mi21:01
6:46
+0:04
20K
1:24:006:463.11 mi20:51
6:43
-0:03
Half(13.11 mi)
1:28:326:450.68 mi4:32
6:39
-0:04
25K
1:44:426:442.42 mi16:10
6:40
+0:01
30K
2:05:426:453.11 mi21:00
6:46
+0:06
20M
2:14:456:441.36 mi9:03
6:40
-0:06
21M
2:21:386:451.00 mi6:53
6:53
+0:13
35K
2:26:196:440.75 mi4:41
6:16
-0:37
23M
2:34:306:431.25 mi8:11
6:32
+0:16
24M
2:40:426:421.00 mi6:12
6:12
-0:20
40K
2:46:046:410.85 mi5:22
6:17
+0:05
25.2M
2:48:256:410.35 mi2:21
6:49
+0:32
Finish(26.22 mi)
2:54:406:401.02 mi6:15
6:08
-0:41
Trend:
Faster pace
Steady pace
Slower pace

Checkpoints & Pacing

Pace Line

Fastest Pace

6:08 /mi

Average Pace

6:40 /mi

Slowest Pace

6:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Time at Faster Pace

1:42:06

58% of race

Time at Steady Pace

1:12:34

42% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:40 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

Heatmap

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Checkpoint and Segment Rankings

CheckpointSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi67876246245753493493
10K3.10 mi6117+670497+127497+1275359389389
15K3.11 mi5959+158483+14483+145753493493
20K3.11 mi5569+390431+52431+524547305305
Half(13.11 mi)0.68 mi5518+51427+4427+44880328328
25K2.42 mi5164+354369+58369+583914244244
30K3.11 mi4683+481323+46323+463206193193
20M1.36 mi4404+279289+34289+342313121121
21M1.00 mi4173+231266+23266+2318469999
35K0.75 mi4023+150254+12254+1215018282
23M1.25 mi3797+226235+19235+1916069999
24M1.00 mi3576+221214+21214+2110425858
40K0.85 mi3396+180198+16198+169355656
25.2M0.35 mi3315+81192+6192+610668181
Finish(26.22 mi)1.02 mi3167+148180+12180+1213308686

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21story building
+97ft-345ft

Overall

5753

Females

493

F18-39

493

5K→10K

3.1 - 6.2 mi

Top 19%
×5story building
+79ft-138ft

Overall

5359

Females

389

F18-39

389

10K→15K

6.2 - 9.3 mi

Top 20%
×3story building
+67ft-78ft

Overall

5753

Females

493

F18-39

493

15K→20K

9.3 - 12.4 mi

Top 16%
×5story building
+106ft-86ft

Overall

4547

Females

305

F18-39

305

20K→Half

12.4 - 13.1 mi

Top 17%
×2story building
+19ft-37ft

Overall

4880

Females

328

F18-39

328

Half→25K

13.1 - 15.5 mi

Top 14%
×4story building
+66ft-88ft

Overall

3914

Females

244

F18-39

244

25K→30K

15.5 - 18.6 mi

Top 11%
×9story building
+181ft-148ft

Overall

3206

Females

193

F18-39

193

30K→20M

18.6 - 20.0 mi

Top 8%
×5story building
+64ft-50ft

Overall

2313

Females

121

F18-39

121

20M→21M

20.0 - 21.0 mi

Top 6%
×8story building
+106ft-24ft

Overall

1846

Females

99

F18-39

99

21M→35K

21.0 - 21.8 mi

Top 5%
×7story building
+17ft-86ft

Overall

1501

Females

82

F18-39

82

35K→23M

21.8 - 23.0 mi

Top 6%
×5story building
+23ft-63ft

Overall

1606

Females

99

F18-39

99

23M→24M

23.0 - 24.0 mi

Top 4%
×6story building
+12ft-82ft

Overall

1042

Females

58

F18-39

58

24M→40K

24.0 - 24.9 mi

Top 3%
×1story
+6ft-20ft

Overall

935

Females

56

F18-39

56

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1066

Females

81

F18-39

81

25.2M→Finish

25.2 - 26.2 mi

Top 5%
×2story building
+22ft-21ft

Overall

1330

Females

86

F18-39

86

Passing Analysis

Category:
Passed
3727
Passed By
107
Net Change
+3620
SegmentPassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6787
5K → 10K68818+670#6787#6117
10K → 15K21456+158#6117#5959
15K → 20K40212+390#5959#5569
20K → Half554+51#5569#5518
Half → 25K3584+354#5518#5164
25K → 30K4909+481#5164#4683
30K → 20M2790+279#4683#4404
20M → 21M2310+231#4404#4173
21M → 35K1500+150#4173#4023
35K → 23M2260+226#4023#3797
23M → 24M2210+221#3797#3576
24M → 40K1811+180#3576#3396
40K → 25.2M821+81#3396#3315
25.2M → Finish1502+148#3315#3167
TOTALS3727107+3620

Passing Charts

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