Boston Marathon logo
BOSTON MARATHON 2025

Katherine Parker

Bib: 21468•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 42%
Gender (Female)
#0 / 12228
Top 26%
Masters (Masters Women)
#0 / 6759
Top 12%
Division (F45-49)
#0 / 1813
Top 14%
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
7:44/mi
24:01
↑ 97↓ 3451.5%
10K· 6.21 mi
7:44/mi
48:04
↑ 79↓ 1380.4%
15K· 9.32 mi
7:43/mi
1:12:01
↑ 67↓ 78
20K· 12.43 mi
7:49/mi
1:36:18
↑ 106↓ 860.1%
Half· 13.11 mi
7:39/mi
1:41:31
↑ 19↓ 370.5%
25K· 15.53 mi
7:53/mi
2:00:39
↑ 66↓ 880.2%
30K· 18.64 mi
8:02/mi
2:25:38
↑ 181↓ 1480.2%
20M
8:08/mi
2:36:41
↑ 64↓ 500.2%
21M
8:55/mi
2:45:36
↑ 106↓ 241.6%
35K· 21.75 mi
7:29/mi
2:51:12
↑ 17↓ 861.7%
23M
7:54/mi
3:01:05
↑ 23↓ 630.6%
24M
7:36/mi
3:08:41
↓ 821.3%
40K· 24.85 mi
7:54/mi
3:15:26
↓ 200.3%
25.2M
8:25/mi
3:18:20
↑ 13↓ 160.2%
Finish· 26.22 mi
7:26/mi
3:25:55
↑ 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
Time1:41:31
Pace7:45 /mi
2nd Half
Distance13.11 mi
Time1:44:24
Pace7:58 /mi
📊Positive Split: 2.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:1324:017:4424:01
7:44
-
10K
6.21 mi11:44:1648:047:4424:03
7:44
0:00
15K
9.32 mi12:08:131:12:017:4423:57
7:43
-0:01
20K
12.43 mi12:32:301:36:187:4524:17
7:49
+0:06
Half
13.11 mi12:37:431:41:317:455:13
7:39
-0:10
25K
15.53 mi12:56:512:00:397:4619:08
7:53
+0:14
30K
18.64 mi13:21:502:25:387:4924:59
8:02
+0:09
20M
20.00 mi13:32:532:36:417:5011:03
8:08
+0:06
21M
21.00 mi13:41:482:45:367:538:55
8:55
+0:47
35K
21.75 mi13:47:242:51:127:525:36
7:29
-1:26
23M
23.00 mi13:57:173:01:057:529:53
7:54
+0:25
24M
24.00 mi14:04:533:08:417:527:36
7:36
-0:18
40K
24.85 mi14:11:383:15:267:526:45
7:54
+0:18
25.2M
25.20 mi14:14:323:18:207:522:54
8:25
+0:31
Finish
26.22 mi14:22:073:25:557:527:35
7:26
-0:59

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

7:26 /mi

Average Pace

7:52 /mi

Slowest Pace

8:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:06

94% of race

Time at Steady Pace

2:54

1% of race

Time at Slower Pace

8:55

4% of race

Average Pace: 7:51 /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 mi11:20:1324:017:4424:01
7:44
#14221
10K
6.21 mi11:44:1648:047:4424:03
7:44
#14203
15K
9.32 mi12:08:131:12:017:4423:57
7:43
#13997
20K
12.43 mi12:32:301:36:187:4524:17
7:49
#13790
Half
13.11 mi12:37:431:41:317:455:13
7:39
#13743
25K
15.53 mi12:56:512:00:397:4619:08
7:53
#13596
30K
18.64 mi13:21:502:25:387:4924:59
8:02
#13197
20M
20.00 mi13:32:532:36:417:5011:03
8:08
#13010
21M
21.00 mi13:41:482:45:367:538:55
8:55
#12967
35K
21.75 mi13:47:242:51:127:525:36
7:29
#12821
23M
23.00 mi13:57:173:01:057:529:53
7:54
#12548
24M
24.00 mi14:04:533:08:417:527:36
7:36
#12338
40K
24.85 mi14:11:383:15:267:526:45
7:54
#12204
25.2M
25.20 mi14:14:323:18:207:522:54
8:25
#12125
Finish
26.22 mi14:22:073:25:557:527:35
7:26
#11965
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi142214045404513593(Top 48%)3779(Top 31%)3779(Top 208%)
10K6.21 mi3.10 mi14203+184056-114056-1114264(Top 50%)4110(Top 34%)4110(Top 227%)
15K9.32 mi3.11 mi13997+2063968+883968+8813593(Top 48%)3779(Top 31%)3779(Top 208%)
20K12.43 mi3.11 mi13790+2073892+763892+7613411(Top 47%)3763(Top 31%)3763(Top 208%)
Half13.11 mi0.68 mi13743+473880+123880+1213008(Top 46%)3494(Top 29%)3494(Top 193%)
25K15.53 mi2.42 mi13596+1473815+653815+6513045(Top 46%)3693(Top 30%)3693(Top 204%)
30K18.64 mi3.11 mi13197+3993667+1483667+14811691(Top 41%)3139(Top 26%)3139(Top 173%)
20M20.00 mi1.36 mi13010+1873585+823585+8211365(Top 40%)3119(Top 26%)3119(Top 172%)
21M21.00 mi1.00 mi12967+433592-73592-713036(Top 46%)4136(Top 34%)4136(Top 228%)
35K21.75 mi0.75 mi12821+1463528+643528+648595(Top 30%)1961(Top 16%)1961(Top 108%)
23M23.00 mi1.25 mi12548+2733421+1073421+1079286(Top 33%)2402(Top 20%)2402(Top 132%)
24M24.00 mi1.00 mi12338+2103344+773344+778454(Top 30%)2086(Top 17%)2086(Top 115%)
40K24.85 mi0.85 mi12204+1343312+323312+329478(Top 33%)2679(Top 22%)2679(Top 148%)
25.2M25.20 mi0.35 mi12125+793284+283284+288376(Top 29%)2256(Top 18%)2256(Top 124%)
Finish26.22 mi1.02 mi11965+1603233+513233+518823(Top 31%)2461(Top 20%)2461(Top 136%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 48%
×21story building
+97ft-345ft

Overall

13593

Females

3779

F45-49

3779

5K→10K

3.1 - 6.2 mi

Top 50%
×5story building
+79ft-138ft

Overall

14264

Females

4110

F45-49

4110

10K→15K

6.2 - 9.3 mi

Top 48%
×3story building
+67ft-78ft

Overall

13593

Females

3779

F45-49

3779

15K→20K

9.3 - 12.4 mi

Top 47%
×5story building
+106ft-86ft

Overall

13411

Females

3763

F45-49

3763

20K→Half

12.4 - 13.1 mi

Top 46%
×2story building
+19ft-37ft

Overall

13008

Females

3494

F45-49

3494

Half→25K

13.1 - 15.5 mi

Top 46%
×4story building
+66ft-88ft

Overall

13045

Females

3693

F45-49

3693

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11691

Females

3139

F45-49

3139

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

11365

Females

3119

F45-49

3119

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13036

Females

4136

F45-49

4136

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

8595

Females

1961

F45-49

1961

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

9286

Females

2402

F45-49

2402

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

8454

Females

2086

F45-49

2086

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9478

Females

2679

F45-49

2679

40K→25.2M

24.9 - 25.2 mi

Top 29%
×1story
+13ft-16ft

Overall

8376

Females

2256

F45-49

2256

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8823

Females

2461

F45-49

2461

Passing Analysis

Category:
Athletes Passed
3042
Passed By
786
Net Change
+2256
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14221
5K → 10K281263+18#14221#14203
10K → 15K30397+206#14203#13997
15K → 20K315108+207#13997#13790
20K → Half6114+47#13790#13743
Half → 25K23992+147#13743#13596
25K → 30K46566+399#13596#13197
30K → 20M20821+187#13197#13010
20M → 21M12077+43#13010#12967
21M → 35K1471+146#12967#12821
35K → 23M28310+273#12821#12548
23M → 24M2177+210#12548#12338
24M → 40K14915+134#12338#12204
40K → 25.2M867+79#12204#12125
25.2M → Finish1688+160#12125#11965
TOTALS3042786+2256
📊

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