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BOSTON MARATHON 2025

Brynn Lautenbacher

Bib: 12935•F

GA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 41%
Gender (Female)
#0 / 12228
Top 26%
Division (F18-39)
#0 / 5469
Top 43%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:11
Rank: #14667
Start → 5K
24:11 | 7:47/mi
10K· 6.21 mi
48:09
Rank: #14321 (+346)
5K → 10K
23:58 | 7:43/mi
15K· 9.32 mi
1:11:55
Rank: #13889 (+432)
10K → 15K
23:46 | 7:39/mi
20K· 12.43 mi
1:35:42
Rank: #13371 (+518)
15K → 20K
23:47 | 7:39/mi
Half· 13.11 mi
1:40:54
Rank: #13339 (+32)
20K → Half
5:12 | 7:37/mi
25K· 15.53 mi
1:59:36
Rank: #13019 (+320)
Half → 25K
18:42 | 7:43/mi
30K· 18.64 mi
2:24:00
Rank: #12468 (+551)
25K → 30K
24:24 | 7:51/mi
20M
2:34:44
Rank: #12213 (+255)
30K → 20M
10:44 | 7:54/mi
21M
2:42:55
Rank: #11950 (+263)
20M → 21M
8:11 | 8:11/mi
35K· 21.75 mi
2:48:49
Rank: #11916 (+34)
21M → 35K
5:54 | 7:53/mi
23M
2:59:12
Rank: #11898 (+18)
35K → 23M
10:23 | 8:18/mi
24M
3:07:24
Rank: #11910 (-12)
23M → 24M
8:12 | 8:12/mi
40K· 24.85 mi
3:14:22
Rank: #11860 (+50)
24M → 40K
6:58 | 8:09/mi
25.2M
3:17:22
Rank: #11822 (+38)
40K → 25.2M
3:00 | 8:42/mi
Finish· 26.22 mi
3:25:12
Rank: #11747 (+75)
25.2M → Finish
7:50 | 7:41/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:40:54
Pace7:42 /mi
2nd Half
Distance13.11 mi
Time1:44:18
Pace7:57 /mi
📊Positive Split: 3.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:3624:117:4724:11
7:47
-
10K
6.21 mi11:17:3448:097:4523:58
7:43
-0:04
15K
9.32 mi11:41:201:11:557:4323:46
7:39
-0:04
20K
12.43 mi12:05:071:35:427:4223:47
7:39
0:00
Half
13.11 mi12:10:191:40:547:425:12
7:37
-0:02
25K
15.53 mi12:29:011:59:367:4218:42
7:43
+0:06
30K
18.64 mi12:53:252:24:007:4324:24
7:51
+0:08
20M
20.00 mi13:04:092:34:447:4410:44
7:54
+0:03
21M
21.00 mi13:12:202:42:557:458:11
8:11
+0:17
35K
21.75 mi13:18:142:48:497:465:54
7:53
-0:18
23M
23.00 mi13:28:372:59:127:4710:23
8:18
+0:25
24M
24.00 mi13:36:493:07:247:498:12
8:12
-0:06
40K
24.85 mi13:43:473:14:227:496:58
8:09
-0:03
25.2M
25.20 mi13:46:473:17:227:503:00
8:42
+0:33
Finish
26.22 mi13:54:373:25:127:507:50
7:41
-1:01

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

7:37 /mi

Average Pace

7:50 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:22:12

99% of race

Time at Steady Pace

3:00

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:50 /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 mi10:53:3624:117:4724:11
7:47
#14667
10K
6.21 mi11:17:3448:097:4523:58
7:43
#14321
15K
9.32 mi11:41:201:11:557:4323:46
7:39
#13889
20K
12.43 mi12:05:071:35:427:4223:47
7:39
#13371
Half
13.11 mi12:10:191:40:547:425:12
7:37
#13339
25K
15.53 mi12:29:011:59:367:4218:42
7:43
#13019
30K
18.64 mi12:53:252:24:007:4324:24
7:51
#12468
20M
20.00 mi13:04:092:34:447:4410:44
7:54
#12213
21M
21.00 mi13:12:202:42:557:458:11
8:11
#11950
35K
21.75 mi13:18:142:48:497:465:54
7:53
#11916
23M
23.00 mi13:28:372:59:127:4710:23
8:18
#11898
24M
24.00 mi13:36:493:07:247:498:12
8:12
#11910
40K
24.85 mi13:43:473:14:227:496:58
8:09
#11860
25.2M
25.20 mi13:46:473:17:227:503:00
8:42
#11822
Finish
26.22 mi13:54:373:25:127:507:50
7:41
#11747
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi146674323432313059(Top 46%)3478(Top 28%)3478(Top 64%)
10K6.21 mi3.10 mi14321+3464131+1924131+19214034(Top 49%)3974(Top 32%)3974(Top 73%)
15K9.32 mi3.11 mi13889+4323902+2293902+22913059(Top 46%)3478(Top 28%)3478(Top 64%)
20K12.43 mi3.11 mi13371+5183640+2623640+26212009(Top 42%)3004(Top 25%)3004(Top 55%)
Half13.11 mi0.68 mi13339+323633+73633+712801(Top 45%)3380(Top 28%)3380(Top 62%)
25K15.53 mi2.42 mi13019+3203487+1463487+14611670(Top 41%)2947(Top 24%)2947(Top 54%)
30K18.64 mi3.11 mi12468+5513253+2343253+23410329(Top 36%)2452(Top 20%)2452(Top 45%)
20M20.00 mi1.36 mi12213+2553147+1063147+1069768(Top 34%)2344(Top 19%)2344(Top 43%)
21M21.00 mi1.00 mi11950+2633045+1023045+1028527(Top 30%)1962(Top 16%)1962(Top 36%)
35K21.75 mi0.75 mi11916+343050-53050-511491(Top 40%)3363(Top 28%)3363(Top 61%)
23M23.00 mi1.25 mi11898+183086-363086-3612012(Top 42%)3746(Top 31%)3746(Top 68%)
24M24.00 mi1.00 mi11910-123123-373123-3712578(Top 44%)4089(Top 33%)4089(Top 75%)
40K24.85 mi0.85 mi11860+503137-143137-1411236(Top 40%)3520(Top 29%)3520(Top 64%)
25.2M25.20 mi0.35 mi11822+383131+63131+610082(Top 35%)3069(Top 25%)3069(Top 56%)
Finish26.22 mi1.02 mi11747+753129+23129+210639(Top 37%)3284(Top 27%)3284(Top 60%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21stories
+97ft-345ft

Overall

13059

Females

3478

F18-39

3478

5K→10K

3.1 - 6.2 mi

Top 49%
×5stories
+79ft-138ft

Overall

14034

Females

3974

F18-39

3974

10K→15K

6.2 - 9.3 mi

Top 46%
×3stories
+67ft-78ft

Overall

13059

Females

3478

F18-39

3478

15K→20K

9.3 - 12.4 mi

Top 42%
×5stories
+106ft-86ft

Overall

12009

Females

3004

F18-39

3004

20K→Half

12.4 - 13.1 mi

Top 45%
×2stories
+19ft-37ft

Overall

12801

Females

3380

F18-39

3380

Half→25K

13.1 - 15.5 mi

Top 41%
×4stories
+66ft-88ft

Overall

11670

Females

2947

F18-39

2947

25K→30K

15.5 - 18.6 mi

Top 36%
×9stories
+181ft-148ft

Overall

10329

Females

2452

F18-39

2452

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

9768

Females

2344

F18-39

2344

20M→21M

20.0 - 21.0 mi

Top 30%
×8stories
+106ft-24ft

Overall

8527

Females

1962

F18-39

1962

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11491

Females

3363

F18-39

3363

35K→23M

21.8 - 23.0 mi

Top 42%
×5stories
+23ft-63ft

Overall

12012

Females

3746

F18-39

3746

23M→24M

23.0 - 24.0 mi

Top 44%
×6stories
+12ft-82ft

Overall

12578

Females

4089

F18-39

4089

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11236

Females

3520

F18-39

3520

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

10082

Females

3069

F18-39

3069

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2stories
+22ft-21ft

Overall

10639

Females

3284

F18-39

3284

Passing Analysis

Category:
Athletes Passed
3565
Passed By
645
Net Change
+2920
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14667
5K → 10K495149+346#14667#14321
10K → 15K47038+432#14321#13889
15K → 20K54022+518#13889#13371
20K → Half5321+32#13371#13339
Half → 25K34828+320#13339#13019
25K → 30K56918+551#13019#12468
30K → 20M26813+255#12468#12213
20M → 21M2729+263#12213#11950
21M → 35K7440+34#11950#11916
35K → 23M118100+18#11916#11898
23M → 24M7183-12#11898#11910
24M → 40K10757+50#11910#11860
40K → 25.2M6123+38#11860#11822
25.2M → Finish11944+75#11822#11747
TOTALS3565645+2920
📊

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