Boston Marathon logo
BOSTON MARATHON 2025

Lauren Seidleck

WA

Bib: 12614 F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 37%
Division (F18-39)
#0 / 5469
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
7:42/mi
23:54
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:53/mi
48:25
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:57/mi
1:13:06
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
8:03/mi
1:38:08
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:59/mi
1:43:35
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
8:14/mi
2:03:32
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
8:29/mi
2:29:53
↑ 181↓ 1480.2%
138 ft elev
20M
8:32/mi
2:41:29
↑ 64↓ 500.2%
148 ft elev
21M
8:56/mi
2:50:25
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
8:24/mi
2:56:42
↑ 17↓ 861.7%
156 ft elev
23M
8:34/mi
3:07:26
↑ 23↓ 630.6%
116 ft elev
24M
8:31/mi
3:15:57
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:35/mi
3:23:17
↓ 200.3%
20 ft elev
25.2M
9:05/mi
3:26:25
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:53/mi
3:34:27
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Is this your race?

Claim it for a free AI report

A coach's-eye read of your race — emailed to you, free.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:35
Pace7:54 /mi
2nd Half
Distance13.11 mi
Time1:50:52
Pace8:27 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4323:547:4223:54
7:42
-
10K
6.21 mi11:16:1448:257:4824:31
7:53
+0:11
15K
9.32 mi11:40:551:13:067:5124:41
7:57
+0:04
20K
12.43 mi12:05:571:38:087:5425:02
8:03
+0:06
Half
13.11 mi12:11:241:43:357:545:27
7:59
-0:04
25K
15.53 mi12:31:212:03:327:5719:57
8:14
+0:15
30K
18.64 mi12:57:422:29:538:0226:21
8:29
+0:15
20M
20.00 mi13:09:182:41:298:0411:36
8:32
+0:03
21M
21.00 mi13:18:142:50:258:078:56
8:56
+0:24
35K
21.75 mi13:24:312:56:428:076:17
8:24
-0:32
23M
23.00 mi13:35:153:07:268:0910:44
8:34
+0:10
24M
24.00 mi13:43:463:15:578:108:31
8:31
-0:03
40K
24.85 mi13:51:063:23:178:117:20
8:35
+0:04
25.2M
25.20 mi13:54:143:26:258:113:08
9:05
+0:30
Finish
26.22 mi14:02:163:34:278:118:02
7:53
-1:12

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

7:42 /mi

Average Pace

8:11 /mi

Slowest Pace

9:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:17:51

64% of race

Time at Steady Pace

1:16:36

36% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:11 /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 mi10:51:4323:547:4223:54
7:42
#13935
10K
6.21 mi11:16:1448:257:4824:31
7:53
#14724
15K
9.32 mi11:40:551:13:067:5124:41
7:57
#15019
20K
12.43 mi12:05:571:38:087:5425:02
8:03
#15072
Half
13.11 mi12:11:241:43:357:545:27
7:59
#15107
25K
15.53 mi12:31:212:03:327:5719:57
8:14
#15178
30K
18.64 mi12:57:422:29:538:0226:21
8:29
#15058
20M
20.00 mi13:09:182:41:298:0411:36
8:32
#14935
21M
21.00 mi13:18:142:50:258:078:56
8:56
#14777
35K
21.75 mi13:24:312:56:428:076:17
8:24
#14747
23M
23.00 mi13:35:153:07:268:0910:44
8:34
#14665
24M
24.00 mi13:43:463:15:578:108:31
8:31
#14649
40K
24.85 mi13:51:063:23:178:117:20
8:35
#14585
25.2M
25.20 mi13:54:143:26:258:113:08
9:05
#14539
Finish
26.22 mi14:02:163:34:278:118:02
7:53
#14403
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi139353867386715628(Top 55%)4921(Top 40%)4921(Top 90%)
10K6.21 mi3.10 mi14724-7894381-5144381-51415606(Top 55%)4891(Top 40%)4891(Top 89%)
15K9.32 mi3.11 mi15019-2954569-1884569-18815628(Top 55%)4921(Top 40%)4921(Top 90%)
20K12.43 mi3.11 mi15072-534624-554624-5515338(Top 54%)4822(Top 39%)4822(Top 88%)
Half13.11 mi0.68 mi15107-354645-214645-2115827(Top 56%)5062(Top 41%)5062(Top 93%)
25K15.53 mi2.42 mi15178-714710-654710-6515481(Top 55%)5007(Top 41%)5007(Top 92%)
30K18.64 mi3.11 mi15058+1204696+144696+1414639(Top 52%)4704(Top 38%)4704(Top 86%)
20M20.00 mi1.36 mi14935+1234658+384658+3814019(Top 49%)4522(Top 37%)4522(Top 83%)
21M21.00 mi1.00 mi14777+1584591+674591+6713151(Top 46%)4196(Top 34%)4196(Top 77%)
35K21.75 mi0.75 mi14747+304595-44595-414868(Top 52%)5157(Top 42%)5157(Top 94%)
23M23.00 mi1.25 mi14665+824585+104585+1013767(Top 48%)4676(Top 38%)4676(Top 86%)
24M24.00 mi1.00 mi14649+164599-144599-1414629(Top 52%)5165(Top 42%)5165(Top 94%)
40K24.85 mi0.85 mi14585+644590+94590+913945(Top 49%)4931(Top 40%)4931(Top 90%)
25.2M25.20 mi0.35 mi14539+464588+24588+212365(Top 44%)4164(Top 34%)4164(Top 76%)
Finish26.22 mi1.02 mi14403+1364540+484540+4812093(Top 43%)3981(Top 33%)3981(Top 73%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

15628

Females

4921

F18-39

4921

5K→10K

3.1 - 6.2 mi

Top 55%
×5story building
+79ft-138ft

Overall

15606

Females

4891

F18-39

4891

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

15628

Females

4921

F18-39

4921

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15338

Females

4822

F18-39

4822

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15827

Females

5062

F18-39

5062

Half→25K

13.1 - 15.5 mi

Top 55%
×4story building
+66ft-88ft

Overall

15481

Females

5007

F18-39

5007

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

14639

Females

4704

F18-39

4704

30K→20M

18.6 - 20.0 mi

Top 49%
×5story building
+64ft-50ft

Overall

14019

Females

4522

F18-39

4522

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13151

Females

4196

F18-39

4196

21M→35K

21.0 - 21.8 mi

Top 52%
×7story building
+17ft-86ft

Overall

14868

Females

5157

F18-39

5157

35K→23M

21.8 - 23.0 mi

Top 48%
×5story building
+23ft-63ft

Overall

13767

Females

4676

F18-39

4676

23M→24M

23.0 - 24.0 mi

Top 52%
×6story building
+12ft-82ft

Overall

14629

Females

5165

F18-39

5165

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13945

Females

4931

F18-39

4931

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

12365

Females

4164

F18-39

4164

25.2M→Finish

25.2 - 26.2 mi

Top 43%
×2story building
+22ft-21ft

Overall

12093

Females

3981

F18-39

3981

Passing Analysis

Category:
Athletes Passed
1862
Passed By
2330
Net Change
-468
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13935
5K → 10K93882-789#13935#14724
10K → 15K111406-295#14724#15019
15K → 20K199252-53#15019#15072
20K → Half2863-35#15072#15107
Half → 25K149220-71#15107#15178
25K → 30K293173+120#15178#15058
30K → 20M18966+123#15058#14935
20M → 21M19133+158#14935#14777
21M → 35K7545+30#14777#14747
35K → 23M14058+82#14747#14665
23M → 24M8064+16#14665#14649
24M → 40K10440+64#14649#14585
40K → 25.2M5610+46#14585#14539
25.2M → Finish15418+136#14539#14403
TOTALS18622330-468
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing