Boston Marathon logo
BOSTON MARATHON 2025

Laura Pierce

Bib: 20224•F

MN

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 43%
Division (F55-59)
#0 / 994
Top 22%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
8:32/mi
26:31
↑ 97↓ 3451.5%
10K· 6.21 mi
8:26/mi
52:43
↑ 79↓ 1380.4%
15K· 9.32 mi
8:26/mi
1:18:56
↑ 67↓ 78
20K· 12.43 mi
8:39/mi
1:45:48
↑ 106↓ 860.1%
Half· 13.11 mi
8:29/mi
1:51:35
↑ 19↓ 370.5%
25K· 15.53 mi
8:35/mi
2:12:23
↑ 66↓ 880.2%
30K· 18.64 mi
8:52/mi
2:39:56
↑ 181↓ 1480.2%
20M
8:48/mi
2:51:54
↑ 64↓ 500.2%
21M
9:14/mi
3:01:08
↑ 106↓ 241.6%
35K· 21.75 mi
8:47/mi
3:07:42
↑ 17↓ 861.7%
23M
9:00/mi
3:18:58
↑ 23↓ 630.6%
24M
9:06/mi
3:28:04
↓ 821.3%
40K· 24.85 mi
9:03/mi
3:35:48
↓ 200.3%
25.2M
10:15/mi
3:39:20
↑ 13↓ 160.2%
Finish· 26.22 mi
8:25/mi
3:47:55
↑ 22↓ 21

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
Time1:51:35
Pace8:31 /mi
2nd Half
Distance13.11 mi
Time1:56:20
Pace8:52 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:3626:318:3226:31
8:32
-
10K
6.21 mi11:44:4852:438:2926:12
8:26
-0:06
15K
9.32 mi12:11:011:18:568:2826:13
8:26
0:00
20K
12.43 mi12:37:531:45:488:3126:52
8:39
+0:13
Half
13.11 mi12:43:401:51:358:315:47
8:29
-0:10
25K
15.53 mi13:04:282:12:238:3120:48
8:35
+0:06
30K
18.64 mi13:32:012:39:568:3527:33
8:52
+0:17
20M
20.00 mi13:43:592:51:548:3611:58
8:48
-0:04
21M
21.00 mi13:53:133:01:088:389:14
9:14
+0:26
35K
21.75 mi13:59:473:07:428:386:34
8:47
-0:27
23M
23.00 mi14:11:033:18:588:3911:16
9:00
+0:13
24M
24.00 mi14:20:093:28:048:409:06
9:06
+0:06
40K
24.85 mi14:27:533:35:488:417:44
9:03
-0:03
25.2M
25.20 mi14:31:253:39:208:423:32
10:15
+1:12
Finish
26.22 mi14:40:003:47:558:428:35
8:25
-1:50

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

8:25 /mi

Average Pace

8:42 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:33:18

41% of race

Time at Steady Pace

1:45:01

46% of race

Time at Slower Pace

29:36

13% of race

Average Pace: 8:42 /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 mi11:18:3626:318:3226:31
8:32
#20099
10K
6.21 mi11:44:4852:438:2926:12
8:26
#19739
15K
9.32 mi12:11:011:18:568:2826:13
8:26
#19477
20K
12.43 mi12:37:531:45:488:3126:52
8:39
#19346
Half
13.11 mi12:43:401:51:358:315:47
8:29
#19333
25K
15.53 mi13:04:282:12:238:3120:48
8:35
#19045
30K
18.64 mi13:32:012:39:568:3527:33
8:52
#18635
20M
20.00 mi13:43:592:51:548:3611:58
8:48
#18406
21M
21.00 mi13:53:133:01:088:389:14
9:14
#18166
35K
21.75 mi13:59:473:07:428:386:34
8:47
#18115
23M
23.00 mi14:11:033:18:588:3911:16
9:00
#17980
24M
24.00 mi14:20:093:28:048:409:06
9:06
#17959
40K
24.85 mi14:27:533:35:488:417:44
9:03
#17902
25.2M
25.20 mi14:31:253:39:208:423:32
10:15
#17914
Finish
26.22 mi14:40:003:47:558:428:35
8:25
#17812
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi200997554755418962(Top 67%)6878(Top 56%)6878(Top 692%)
10K6.21 mi3.10 mi19739+3607321+2337321+23319405(Top 68%)7114(Top 58%)7114(Top 716%)
15K9.32 mi3.11 mi19477+2627167+1547167+15418962(Top 67%)6878(Top 56%)6878(Top 692%)
20K12.43 mi3.11 mi19346+1317106+617106+6119137(Top 67%)6985(Top 57%)6985(Top 703%)
Half13.11 mi0.68 mi19333+137100+67100+619079(Top 67%)6938(Top 57%)6938(Top 698%)
25K15.53 mi2.42 mi19045+2886944+1566944+15617693(Top 62%)6249(Top 51%)6249(Top 629%)
30K18.64 mi3.11 mi18635+4106738+2066738+20616998(Top 60%)6029(Top 49%)6029(Top 607%)
20M20.00 mi1.36 mi18406+2296644+946644+9415734(Top 55%)5447(Top 45%)5447(Top 548%)
21M21.00 mi1.00 mi18166+2406537+1076537+10714857(Top 52%)5097(Top 42%)5097(Top 513%)
35K21.75 mi0.75 mi18115+516519+186519+1817166(Top 60%)6445(Top 53%)6445(Top 648%)
23M23.00 mi1.25 mi17980+1356486+336486+3316270(Top 57%)6044(Top 49%)6044(Top 608%)
24M24.00 mi1.00 mi17959+216503-176503-1717897(Top 63%)6974(Top 57%)6974(Top 702%)
40K24.85 mi0.85 mi17902+576492+116492+1116602(Top 58%)6372(Top 52%)6372(Top 641%)
25.2M25.20 mi0.35 mi17914-126508-166508-1618121(Top 64%)7196(Top 59%)7196(Top 724%)
Finish26.22 mi1.02 mi17812+1026473+356473+3515769(Top 56%)5901(Top 48%)5901(Top 594%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 67%
×21story building
+97ft-345ft

Overall

18962

Females

6878

F55-59

6878

5K→10K

3.1 - 6.2 mi

Top 68%
×5story building
+79ft-138ft

Overall

19405

Females

7114

F55-59

7114

10K→15K

6.2 - 9.3 mi

Top 67%
×3story building
+67ft-78ft

Overall

18962

Females

6878

F55-59

6878

15K→20K

9.3 - 12.4 mi

Top 67%
×5story building
+106ft-86ft

Overall

19137

Females

6985

F55-59

6985

20K→Half

12.4 - 13.1 mi

Top 67%
×2story building
+19ft-37ft

Overall

19079

Females

6938

F55-59

6938

Half→25K

13.1 - 15.5 mi

Top 62%
×4story building
+66ft-88ft

Overall

17693

Females

6249

F55-59

6249

25K→30K

15.5 - 18.6 mi

Top 60%
×9story building
+181ft-148ft

Overall

16998

Females

6029

F55-59

6029

30K→20M

18.6 - 20.0 mi

Top 55%
×5story building
+64ft-50ft

Overall

15734

Females

5447

F55-59

5447

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

14857

Females

5097

F55-59

5097

21M→35K

21.0 - 21.8 mi

Top 60%
×7story building
+17ft-86ft

Overall

17166

Females

6445

F55-59

6445

35K→23M

21.8 - 23.0 mi

Top 57%
×5story building
+23ft-63ft

Overall

16270

Females

6044

F55-59

6044

23M→24M

23.0 - 24.0 mi

Top 63%
×6story building
+12ft-82ft

Overall

17897

Females

6974

F55-59

6974

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

16602

Females

6372

F55-59

6372

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

18121

Females

7196

F55-59

7196

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

15769

Females

5901

F55-59

5901

Passing Analysis

Category:
Athletes Passed
2999
Passed By
712
Net Change
+2287
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#20099
5K → 10K503143+360#20099#19739
10K → 15K33977+262#19739#19477
15K → 20K267136+131#19477#19346
20K → Half3825+13#19346#19333
Half → 25K32537+288#19333#19045
25K → 30K46353+410#19045#18635
30K → 20M24213+229#18635#18406
20M → 21M25010+240#18406#18166
21M → 35K7827+51#18166#18115
35K → 23M17439+135#18115#17980
23M → 24M8766+21#17980#17959
24M → 40K8528+57#17959#17902
40K → 25.2M2234-12#17902#17914
25.2M → Finish12624+102#17914#17812
TOTALS2999712+2287
📊

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