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BOSTON MARATHON 2025

Eliza Kerschner

Bib: 4625•F

ME

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 12%
Gender (Female)
#0 / 12228
Top 2%
Division (F18-39)
#0 / 5469
Top 4%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:55
Rank: #3216
Start → 5K
19:55 | 6:25/mi
10K· 6.21 mi
39:57
Rank: #3277 (-61)
5K → 10K
20:02 | 6:27/mi
15K· 9.32 mi
59:53
Rank: #3171 (+106)
10K → 15K
19:56 | 6:25/mi
20K· 12.43 mi
1:19:49
Rank: #3001 (+170)
15K → 20K
19:56 | 6:25/mi
Half· 13.11 mi
1:24:09
Rank: #2987 (+14)
20K → Half
4:20 | 6:21/mi
25K· 15.53 mi
1:39:54
Rank: #2942 (+45)
Half → 25K
15:45 | 6:30/mi
30K· 18.64 mi
2:01:26
Rank: #3128 (-186)
25K → 30K
21:32 | 6:56/mi
20M
2:11:20
Rank: #3256 (-128)
30K → 20M
9:54 | 7:17/mi
21M
2:19:20
Rank: #3476 (-220)
20M → 21M
8:00 | 8:00/mi
35K· 21.75 mi
2:24:42
Rank: #3532 (-56)
21M → 35K
5:22 | 7:10/mi
23M
2:33:35
Rank: #3536 (-4)
35K → 23M
8:53 | 7:06/mi
24M
2:40:31
Rank: #3526 (+10)
23M → 24M
6:56 | 6:56/mi
40K· 24.85 mi
2:46:28
Rank: #3490 (+36)
24M → 40K
5:57 | 6:58/mi
25.2M
2:49:04
Rank: #3475 (+15)
40K → 25.2M
2:36 | 7:32/mi
Finish· 26.22 mi
2:55:54
Rank: #3463 (+12)
25.2M → Finish
6:50 | 6:42/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:24:09
Pace6:25 /mi
2nd Half
Distance13.11 mi
Time1:31:45
Pace7:00 /mi
📊Positive Split: 9.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2219:556:2519:55
6:25
-
10K
6.21 mi10:43:2439:576:2620:02
6:27
+0:02
15K
9.32 mi11:03:2059:536:2519:56
6:25
-0:02
20K
12.43 mi11:23:161:19:496:2519:56
6:25
0:00
Half
13.11 mi11:27:361:24:096:254:20
6:21
-0:04
25K
15.53 mi11:43:211:39:546:2615:45
6:30
+0:09
30K
18.64 mi12:04:532:01:266:3121:32
6:56
+0:26
20M
20.00 mi12:14:472:11:206:349:54
7:17
+0:21
21M
21.00 mi12:22:472:19:206:388:00
8:00
+0:43
35K
21.75 mi12:28:092:24:426:395:22
7:10
-0:50
23M
23.00 mi12:37:022:33:356:418:53
7:06
-0:04
24M
24.00 mi12:43:582:40:316:416:56
6:56
-0:10
40K
24.85 mi12:49:552:46:286:425:57
6:58
+0:02
25.2M
25.20 mi12:52:312:49:046:432:36
7:32
+0:34
Finish
26.22 mi12:59:212:55:546:436:50
6:42
-0:50

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

6:21 /mi

Average Pace

6:43 /mi

Slowest Pace

8:00 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:39:54

57% of race

Time at Steady Pace

55:30

32% of race

Time at Slower Pace

20:30

12% of race

Average Pace: 6:43 /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 mi10:23:2219:556:2519:55
6:25
#3216
10K
6.21 mi10:43:2439:576:2620:02
6:27
#3277
15K
9.32 mi11:03:2059:536:2519:56
6:25
#3171
20K
12.43 mi11:23:161:19:496:2519:56
6:25
#3001
Half
13.11 mi11:27:361:24:096:254:20
6:21
#2987
25K
15.53 mi11:43:211:39:546:2615:45
6:30
#2942
30K
18.64 mi12:04:532:01:266:3121:32
6:56
#3128
20M
20.00 mi12:14:472:11:206:349:54
7:17
#3256
21M
21.00 mi12:22:472:19:206:388:00
8:00
#3476
35K
21.75 mi12:28:092:24:426:395:22
7:10
#3532
23M
23.00 mi12:37:022:33:356:418:53
7:06
#3536
24M
24.00 mi12:43:582:40:316:416:56
6:56
#3526
40K
24.85 mi12:49:552:46:286:425:57
6:58
#3490
25.2M
25.20 mi12:52:312:49:046:432:36
7:32
#3475
Finish
26.22 mi12:59:212:55:546:436:50
6:42
#3463
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi32161541543054(Top 11%)139(Top 1%)139(Top 3%)
10K6.21 mi3.10 mi3277-61157-3157-33373(Top 12%)164(Top 1%)164(Top 3%)
15K9.32 mi3.11 mi3171+106148+9148+93054(Top 11%)139(Top 1%)139(Top 3%)
20K12.43 mi3.11 mi3001+170134+14134+142624(Top 9%)118(Top 1.0%)118(Top 2%)
Half13.11 mi0.68 mi2987+14133+1133+12861(Top 10%)126(Top 1%)126(Top 2%)
25K15.53 mi2.42 mi2942+45131+2131+22890(Top 10%)135(Top 1%)135(Top 2%)
30K18.64 mi3.11 mi3128-186147-16147-164289(Top 15%)339(Top 3%)339(Top 6%)
20M20.00 mi1.36 mi3256-128165-18165-185713(Top 20%)706(Top 6%)706(Top 13%)
21M21.00 mi1.00 mi3476-220185-20185-207352(Top 26%)1447(Top 12%)1447(Top 26%)
35K21.75 mi0.75 mi3532-56197-12197-126458(Top 23%)1074(Top 9%)1074(Top 20%)
23M23.00 mi1.25 mi3536-4205-8205-84323(Top 15%)479(Top 4%)479(Top 9%)
24M24.00 mi1.00 mi3526+10209-4209-44286(Top 15%)508(Top 4%)508(Top 9%)
40K24.85 mi0.85 mi3490+36212-3212-33691(Top 13%)421(Top 3%)421(Top 8%)
25.2M25.20 mi0.35 mi3475+15215-3215-33650(Top 13%)452(Top 4%)452(Top 8%)
Finish26.22 mi1.02 mi3463+12218-3218-33934(Top 14%)526(Top 4%)526(Top 10%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 11%
×21stories
+97ft-345ft

Overall

3054

Females

139

F18-39

139

5K→10K

3.1 - 6.2 mi

Top 12%
×5stories
+79ft-138ft

Overall

3373

Females

164

F18-39

164

10K→15K

6.2 - 9.3 mi

Top 11%
×3stories
+67ft-78ft

Overall

3054

Females

139

F18-39

139

15K→20K

9.3 - 12.4 mi

Top 9%
×5stories
+106ft-86ft

Overall

2624

Females

118

F18-39

118

20K→Half

12.4 - 13.1 mi

Top 10%
×2stories
+19ft-37ft

Overall

2861

Females

126

F18-39

126

Half→25K

13.1 - 15.5 mi

Top 10%
×4stories
+66ft-88ft

Overall

2890

Females

135

F18-39

135

25K→30K

15.5 - 18.6 mi

Top 15%
×9stories
+181ft-148ft

Overall

4289

Females

339

F18-39

339

30K→20M

18.6 - 20.0 mi

Top 20%
×5stories
+64ft-50ft

Overall

5713

Females

706

F18-39

706

20M→21M

20.0 - 21.0 mi

Top 26%
×8stories
+106ft-24ft

Overall

7352

Females

1447

F18-39

1447

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6458

Females

1074

F18-39

1074

35K→23M

21.8 - 23.0 mi

Top 15%
×5stories
+23ft-63ft

Overall

4323

Females

479

F18-39

479

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4286

Females

508

F18-39

508

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3691

Females

421

F18-39

421

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3650

Females

452

F18-39

452

25.2M→Finish

25.2 - 26.2 mi

Top 14%
×2stories
+22ft-21ft

Overall

3934

Females

526

F18-39

526

Passing Analysis

Category:
Athletes Passed
942
Passed By
1189
Net Change
-247
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3216
5K → 10K110171-61#3216#3277
10K → 15K14943+106#3277#3171
15K → 20K18717+170#3171#3001
20K → Half239+14#3001#2987
Half → 25K8944+45#2987#2942
25K → 30K56242-186#2942#3128
30K → 20M31159-128#3128#3256
20M → 21M9229-220#3256#3476
21M → 35K2682-56#3476#3532
35K → 23M6165-4#3532#3536
23M → 24M5545+10#3536#3526
24M → 40K6529+36#3526#3490
40K → 25.2M3217+15#3490#3475
25.2M → Finish4937+12#3475#3463
TOTALS9421189-247
📊

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