Boston Marathon logo
BOSTON MARATHON 2025

Chelsea Lauder

Bib: 32316•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
31:16
Rank: #25736
Start → 5K
31:16 | 10:04/mi
10K· 6.21 mi
1:03:43
Rank: #26012 (-276)
5K → 10K
32:27 | 10:27/mi
15K· 9.32 mi
1:37:16
Rank: #26164 (-152)
10K → 15K
33:33 | 10:48/mi
20K· 12.43 mi
2:17:22
Rank: #26860 (-696)
15K → 20K
40:06 | 12:54/mi
Half· 13.11 mi
2:25:13
Rank: #26878 (-18)
20K → Half
7:51 | 11:30/mi
25K· 15.53 mi
2:57:53
Rank: #27068 (-190)
Half → 25K
32:40 | 13:28/mi
30K· 18.64 mi
3:41:05
Rank: #27153 (-85)
25K → 30K
43:12 | 13:54/mi
20M
3:59:05
Rank: #27136 (+17)
30K → 20M
18:00 | 13:15/mi
21M
4:13:50
Rank: #27139 (-3)
20M → 21M
14:45 | 14:45/mi
35K· 21.75 mi
4:23:48
Rank: #27151 (-12)
21M → 35K
9:58 | 13:19/mi
23M
4:40:52
Rank: #27164 (-13)
35K → 23M
17:04 | 13:38/mi
24M
4:54:20
Rank: #27177 (-13)
23M → 24M
13:28 | 13:28/mi
40K· 24.85 mi
5:05:47
Rank: #27170 (+7)
24M → 40K
11:27 | 13:24/mi
25.2M
5:10:31
Rank: #27162 (+8)
40K → 25.2M
4:44 | 13:44/mi
Finish· 26.22 mi
5:22:24
Rank: #27146 (+16)
25.2M → Finish
11:53 | 11:40/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:25:13
Pace11:05 /mi
2nd Half
Distance13.11 mi
Time2:57:11
Pace13:31 /mi
📊Positive Split: 22.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:56:1431:1610:0431:16
10:04
-
10K
6.21 mi12:28:411:03:4310:1532:27
10:27
+0:23
15K
9.32 mi13:02:141:37:1610:2633:33
10:48
+0:21
20K
12.43 mi13:42:202:17:2211:0340:06
12:54
+2:06
Half
13.11 mi13:50:112:25:1311:057:51
11:30
-1:24
25K
15.53 mi14:22:512:57:5311:2732:40
13:28
+1:58
30K
18.64 mi15:06:033:41:0511:5243:12
13:54
+0:26
20M
20.00 mi15:24:033:59:0511:5718:00
13:15
-0:39
21M
21.00 mi15:38:484:13:5012:0514:45
14:45
+1:30
35K
21.75 mi15:48:464:23:4812:089:58
13:19
-1:26
23M
23.00 mi16:05:504:40:5212:1317:04
13:38
+0:19
24M
24.00 mi16:19:184:54:2012:1613:28
13:28
-0:10
40K
24.85 mi16:30:455:05:4712:1811:27
13:24
-0:04
25.2M
25.20 mi16:35:295:10:3112:194:44
13:44
+0:20
Finish
26.22 mi16:47:225:22:2412:1811:53
11:40
-2:04

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

10:04 /mi

Average Pace

12:18 /mi

Slowest Pace

14:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:57:00

36% of race

Time at Steady Pace

3:10:39

59% of race

Time at Slower Pace

14:45

5% of race

Average Pace: 12:18 /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 mi11:56:1431:1610:0431:16
10:04
#25736
10K
6.21 mi12:28:411:03:4310:1532:27
10:27
#26012
15K
9.32 mi13:02:141:37:1610:2633:33
10:48
#26164
20K
12.43 mi13:42:202:17:2211:0340:06
12:54
#26860
Half
13.11 mi13:50:112:25:1311:057:51
11:30
#26878
25K
15.53 mi14:22:512:57:5311:2732:40
13:28
#27068
30K
18.64 mi15:06:033:41:0511:5243:12
13:54
#27153
20M
20.00 mi15:24:033:59:0511:5718:00
13:15
#27136
21M
21.00 mi15:38:484:13:5012:0514:45
14:45
#27139
35K
21.75 mi15:48:464:23:4812:089:58
13:19
#27151
23M
23.00 mi16:05:504:40:5212:1317:04
13:38
#27164
24M
24.00 mi16:19:184:54:2012:1613:28
13:28
#27177
40K
24.85 mi16:30:455:05:4712:1811:27
13:24
#27170
25.2M
25.20 mi16:35:295:10:3112:194:44
13:44
#27162
Finish
26.22 mi16:47:225:22:2412:1811:53
11:40
#27146
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi25736106101061026409(Top 93%)11010(Top 90%)11010(Top 201%)
10K6.21 mi3.10 mi26012-27610786-17610786-17626172(Top 92%)10893(Top 89%)10893(Top 199%)
15K9.32 mi3.11 mi26164-15210871-8510871-8526409(Top 93%)11010(Top 90%)11010(Top 201%)
20K12.43 mi3.11 mi26860-69611277-40611277-40627771(Top 98%)11855(Top 97%)11855(Top 217%)
Half13.11 mi0.68 mi26878-1811297-2011297-2027054(Top 95%)11454(Top 94%)11454(Top 209%)
25K15.53 mi2.42 mi27068-19011420-12311420-12327599(Top 97%)11773(Top 96%)11773(Top 215%)
30K18.64 mi3.11 mi27153-8511490-7011490-7027435(Top 97%)11739(Top 96%)11739(Top 215%)
20M20.00 mi1.36 mi27136+1711486+411486+426678(Top 94%)11389(Top 93%)11389(Top 208%)
21M21.00 mi1.00 mi27139-311493-711493-726937(Top 95%)11535(Top 94%)11535(Top 211%)
35K21.75 mi0.75 mi27151-1211507-1411507-1427223(Top 96%)11703(Top 96%)11703(Top 214%)
23M23.00 mi1.25 mi27164-1311523-1611523-1626993(Top 95%)11603(Top 95%)11603(Top 212%)
24M24.00 mi1.00 mi27177-1311540-1711540-1727286(Top 96%)11798(Top 96%)11798(Top 216%)
40K24.85 mi0.85 mi27170+711538+211538+226664(Top 94%)11479(Top 94%)11479(Top 210%)
25.2M25.20 mi0.35 mi27162+811535+311535+325946(Top 91%)11158(Top 91%)11158(Top 204%)
Finish26.22 mi1.02 mi27146+1611533+211533+226373(Top 93%)11330(Top 93%)11330(Top 207%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 93%
×21stories
+97ft-345ft

Overall

26409

Females

11010

F18-39

11010

5K→10K

3.1 - 6.2 mi

Top 92%
×5stories
+79ft-138ft

Overall

26172

Females

10893

F18-39

10893

10K→15K

6.2 - 9.3 mi

Top 93%
×3stories
+67ft-78ft

Overall

26409

Females

11010

F18-39

11010

15K→20K

9.3 - 12.4 mi

Top 98%
×5stories
+106ft-86ft

Overall

27771

Females

11855

F18-39

11855

20K→Half

12.4 - 13.1 mi

Top 95%
×2stories
+19ft-37ft

Overall

27054

Females

11454

F18-39

11454

Half→25K

13.1 - 15.5 mi

Top 97%
×4stories
+66ft-88ft

Overall

27599

Females

11773

F18-39

11773

25K→30K

15.5 - 18.6 mi

Top 97%
×9stories
+181ft-148ft

Overall

27435

Females

11739

F18-39

11739

30K→20M

18.6 - 20.0 mi

Top 94%
×5stories
+64ft-50ft

Overall

26678

Females

11389

F18-39

11389

20M→21M

20.0 - 21.0 mi

Top 95%
×8stories
+106ft-24ft

Overall

26937

Females

11535

F18-39

11535

21M→35K

21.0 - 21.8 mi

Top 96%
×7stories
+17ft-86ft

Overall

27223

Females

11703

F18-39

11703

35K→23M

21.8 - 23.0 mi

Top 95%
×5stories
+23ft-63ft

Overall

26993

Females

11603

F18-39

11603

23M→24M

23.0 - 24.0 mi

Top 96%
×6stories
+12ft-82ft

Overall

27286

Females

11798

F18-39

11798

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

26664

Females

11479

F18-39

11479

40K→25.2M

24.9 - 25.2 mi

Top 91%
×1story
+13ft-16ft

Overall

25946

Females

11158

F18-39

11158

25.2M→Finish

25.2 - 26.2 mi

Top 93%
×2stories
+22ft-21ft

Overall

26373

Females

11330

F18-39

11330

Passing Analysis

Category:
Athletes Passed
443
Passed By
1853
Net Change
-1410
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25736
5K → 10K101377-276#25736#26012
10K → 15K81233-152#26012#26164
15K → 20K11707-696#26164#26860
20K → Half1129-18#26860#26878
Half → 25K22212-190#26878#27068
25K → 30K53138-85#27068#27153
30K → 20M4225+17#27153#27136
20M → 21M1922-3#27136#27139
21M → 35K1224-12#27139#27151
35K → 23M2033-13#27151#27164
23M → 24M1629-13#27164#27177
24M → 40K2114+7#27177#27170
40K → 25.2M124+8#27170#27162
25.2M → Finish226+16#27162#27146
TOTALS4431853-1410
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing