Boston Marathon logo
BOSTON MARATHON 2025

Karen Nelson

Bib: 24661•F

MI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F60-64)
#0 / 624
Top 19%
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
9:18/mi
28:55
↑ 97↓ 3451.5%
10K· 6.21 mi
9:18/mi
57:48
↑ 79↓ 1380.4%
15K· 9.32 mi
9:12/mi
1:26:23
↑ 67↓ 78
20K· 12.43 mi
8:53/mi
1:54:00
↑ 106↓ 860.1%
Half· 13.11 mi
8:37/mi
1:59:53
↑ 19↓ 370.5%
25K· 15.53 mi
8:50/mi
2:21:17
↑ 66↓ 880.2%
30K· 18.64 mi
8:57/mi
2:49:04
↑ 181↓ 1480.2%
20M
8:54/mi
3:01:09
↑ 64↓ 500.2%
21M
9:45/mi
3:10:54
↑ 106↓ 241.6%
35K· 21.75 mi
8:49/mi
3:17:30
↑ 17↓ 861.7%
23M
8:38/mi
3:28:18
↑ 23↓ 630.6%
24M
8:38/mi
3:36:56
↓ 821.3%
40K· 24.85 mi
8:26/mi
3:44:09
↓ 200.3%
25.2M
9:25/mi
3:47:24
↑ 13↓ 160.2%
Finish· 26.22 mi
8:20/mi
3:55:54
↑ 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 Half
Distance13.11 mi
Time1:59:53
Pace9:09 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:56:01
Pace8:51 /mi
📊Negative Split: 3.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:30:1628:559:1828:55
9:18
-
10K
6.21 mi11:59:0957:489:1828:53
9:18
0:00
15K
9.32 mi12:27:441:26:239:1628:35
9:12
-0:06
20K
12.43 mi12:55:211:54:009:1027:37
8:53
-0:19
Half
13.11 mi13:01:141:59:539:095:53
8:37
-0:16
25K
15.53 mi13:22:382:21:179:0621:24
8:50
+0:13
30K
18.64 mi13:50:252:49:049:0427:47
8:57
+0:07
20M
20.00 mi14:02:303:01:099:0312:05
8:54
-0:03
21M
21.00 mi14:12:153:10:549:059:45
9:45
+0:51
35K
21.75 mi14:18:513:17:309:056:36
8:49
-0:56
23M
23.00 mi14:29:393:28:189:0310:48
8:38
-0:11
24M
24.00 mi14:38:173:36:569:028:38
8:38
0:00
40K
24.85 mi14:45:303:44:099:017:13
8:26
-0:12
25.2M
25.20 mi14:48:453:47:249:013:15
9:25
+0:59
Finish
26.22 mi14:57:153:55:549:008:30
8:20
-1:05

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

8:20 /mi

Average Pace

9:00 /mi

Slowest Pace

9:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:31

58% of race

Time at Steady Pace

1:39:23

42% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:00 /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 mi11:30:1628:559:1828:55
9:18
#23584
10K
6.21 mi11:59:0957:489:1828:53
9:18
#23571
15K
9.32 mi12:27:441:26:239:1628:35
9:12
#23334
20K
12.43 mi12:55:211:54:009:1027:37
8:53
#22670
Half
13.11 mi13:01:141:59:539:095:53
8:37
#22547
25K
15.53 mi13:22:382:21:179:0621:24
8:50
#21982
30K
18.64 mi13:50:252:49:049:0427:47
8:57
#21196
20M
20.00 mi14:02:303:01:099:0312:05
8:54
#20831
21M
21.00 mi14:12:153:10:549:059:45
9:45
#20602
35K
21.75 mi14:18:513:17:309:056:36
8:49
#20506
23M
23.00 mi14:29:393:28:189:0310:48
8:38
#20173
24M
24.00 mi14:38:173:36:569:028:38
8:38
#19992
40K
24.85 mi14:45:303:44:099:017:13
8:26
#19770
25.2M
25.20 mi14:48:453:47:249:013:15
9:25
#19691
Finish
26.22 mi14:57:153:55:549:008:30
8:20
#19534
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi235849480948022862(Top 80%)9024(Top 74%)9024(Top 1446%)
10K6.21 mi3.10 mi23571+139466+149466+1423521(Top 83%)9422(Top 77%)9422(Top 1510%)
15K9.32 mi3.11 mi23334+2379310+1569310+15622862(Top 80%)9024(Top 74%)9024(Top 1446%)
20K12.43 mi3.11 mi22670+6648938+3728938+37220415(Top 72%)7717(Top 63%)7717(Top 1237%)
Half13.11 mi0.68 mi22547+1238883+558883+5519973(Top 70%)7461(Top 61%)7461(Top 1196%)
25K15.53 mi2.42 mi21982+5658594+2898594+28919073(Top 67%)7014(Top 57%)7014(Top 1124%)
30K18.64 mi3.11 mi21196+7868188+4068188+40617395(Top 61%)6248(Top 51%)6248(Top 1001%)
20M20.00 mi1.36 mi20831+3658013+1758013+17516223(Top 57%)5742(Top 47%)5742(Top 920%)
21M21.00 mi1.00 mi20602+2297906+1077906+10717289(Top 61%)6429(Top 53%)6429(Top 1030%)
35K21.75 mi0.75 mi20506+967870+367870+3617411(Top 61%)6598(Top 54%)6598(Top 1057%)
23M23.00 mi1.25 mi20173+3337712+1587712+15814140(Top 50%)4884(Top 40%)4884(Top 783%)
24M24.00 mi1.00 mi19992+1817636+767636+7615313(Top 54%)5563(Top 45%)5563(Top 892%)
40K24.85 mi0.85 mi19770+2227537+997537+9913109(Top 46%)4520(Top 37%)4520(Top 724%)
25.2M25.20 mi0.35 mi19691+797501+367501+3614298(Top 50%)5218(Top 43%)5218(Top 836%)
Finish26.22 mi1.02 mi19534+1577429+727429+7215235(Top 54%)5620(Top 46%)5620(Top 901%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 80%
×21story building
+97ft-345ft

Overall

22862

Females

9024

F60-64

9024

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

23521

Females

9422

F60-64

9422

10K→15K

6.2 - 9.3 mi

Top 80%
×3story building
+67ft-78ft

Overall

22862

Females

9024

F60-64

9024

15K→20K

9.3 - 12.4 mi

Top 72%
×5story building
+106ft-86ft

Overall

20415

Females

7717

F60-64

7717

20K→Half

12.4 - 13.1 mi

Top 70%
×2story building
+19ft-37ft

Overall

19973

Females

7461

F60-64

7461

Half→25K

13.1 - 15.5 mi

Top 67%
×4story building
+66ft-88ft

Overall

19073

Females

7014

F60-64

7014

25K→30K

15.5 - 18.6 mi

Top 61%
×9story building
+181ft-148ft

Overall

17395

Females

6248

F60-64

6248

30K→20M

18.6 - 20.0 mi

Top 57%
×5story building
+64ft-50ft

Overall

16223

Females

5742

F60-64

5742

20M→21M

20.0 - 21.0 mi

Top 61%
×8story building
+106ft-24ft

Overall

17289

Females

6429

F60-64

6429

21M→35K

21.0 - 21.8 mi

Top 61%
×7story building
+17ft-86ft

Overall

17411

Females

6598

F60-64

6598

35K→23M

21.8 - 23.0 mi

Top 50%
×5story building
+23ft-63ft

Overall

14140

Females

4884

F60-64

4884

23M→24M

23.0 - 24.0 mi

Top 54%
×6story building
+12ft-82ft

Overall

15313

Females

5563

F60-64

5563

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13109

Females

4520

F60-64

4520

40K→25.2M

24.9 - 25.2 mi

Top 50%
×1story
+13ft-16ft

Overall

14298

Females

5218

F60-64

5218

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

15235

Females

5620

F60-64

5620

Passing Analysis

Category:
Athletes Passed
4396
Passed By
346
Net Change
+4050
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23584
5K → 10K242229+13#23584#23571
10K → 15K31275+237#23571#23334
15K → 20K6651+664#23334#22670
20K → Half1252+123#22670#22547
Half → 25K5694+565#22547#21982
25K → 30K7904+786#21982#21196
30K → 20M3650+365#21196#20831
20M → 21M24011+229#20831#20602
21M → 35K1037+96#20602#20506
35K → 23M3341+333#20506#20173
23M → 24M1843+181#20173#19992
24M → 40K2220+222#19992#19770
40K → 25.2M801+79#19770#19691
25.2M → Finish1658+157#19691#19534
TOTALS4396346+4050
📊

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