Boston Marathon logo
BOSTON MARATHON 2025

Ashley Nelson

Bib: 13039•F

CO

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 31%
Gender (Female)
#0 / 12228
Top 14%
Division (F18-39)
#0 / 5469
Top 25%
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
7:28/mi
23:11
↑ 97↓ 3451.5%
10K· 6.21 mi
7:23/mi
46:07
↑ 79↓ 1380.4%
15K· 9.32 mi
7:15/mi
1:08:40
↑ 67↓ 78
20K· 12.43 mi
7:15/mi
1:31:12
↑ 106↓ 860.1%
Half· 13.11 mi
7:11/mi
1:36:06
↑ 19↓ 370.5%
25K· 15.53 mi
7:20/mi
1:53:52
↑ 66↓ 880.2%
30K· 18.64 mi
7:20/mi
2:16:39
↑ 181↓ 1480.2%
20M
7:30/mi
2:26:51
↑ 64↓ 500.2%
21M
7:52/mi
2:34:43
↑ 106↓ 241.6%
35K· 21.75 mi
7:17/mi
2:40:10
↑ 17↓ 861.7%
23M
7:49/mi
2:49:58
↑ 23↓ 630.6%
24M
7:49/mi
2:57:47
↓ 821.3%
40K· 24.85 mi
8:18/mi
3:04:52
↓ 200.3%
25.2M
8:18/mi
3:07:44
↑ 13↓ 160.2%
Finish· 26.22 mi
8:01/mi
3:15:54
↑ 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 HalfFaster
Distance13.11 mi
Time1:36:06
Pace7:20 /mi
2nd Half
Distance13.11 mi
Time1:39:48
Pace7:37 /mi
📊Positive Split: 3.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:4523:117:2823:11
7:28
-
10K
6.21 mi11:14:4146:077:2522:56
7:23
-0:05
15K
9.32 mi11:37:141:08:407:2222:33
7:15
-0:08
20K
12.43 mi11:59:461:31:127:2022:32
7:15
0:00
Half
13.11 mi12:04:401:36:067:204:54
7:11
-0:04
25K
15.53 mi12:22:261:53:527:2017:46
7:20
+0:09
30K
18.64 mi12:45:132:16:397:2022:47
7:20
0:00
20M
20.00 mi12:55:252:26:517:2110:12
7:30
+0:10
21M
21.00 mi13:03:172:34:437:227:52
7:52
+0:22
35K
21.75 mi13:08:442:40:107:225:27
7:17
-0:35
23M
23.00 mi13:18:322:49:587:239:48
7:49
+0:32
24M
24.00 mi13:26:212:57:477:247:49
7:49
0:00
40K
24.85 mi13:33:263:04:527:267:05
8:18
+0:29
25.2M
25.20 mi13:36:183:07:447:272:52
8:18
0:00
Finish
26.22 mi13:44:283:15:547:298:10
8:01
-0:17

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

7:11 /mi

Average Pace

7:29 /mi

Slowest Pace

8:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:57:47

91% of race

Time at Steady Pace

18:07

9% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:28 /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 mi10:51:4523:117:2823:11
7:28
#11904
10K
6.21 mi11:14:4146:077:2522:56
7:23
#11436
15K
9.32 mi11:37:141:08:407:2222:33
7:15
#10785
20K
12.43 mi11:59:461:31:127:2022:32
7:15
#10209
Half
13.11 mi12:04:401:36:067:204:54
7:11
#10142
25K
15.53 mi12:22:261:53:527:2017:46
7:20
#9831
30K
18.64 mi12:45:132:16:397:2022:47
7:20
#9112
20M
20.00 mi12:55:252:26:517:2110:12
7:30
#8889
21M
21.00 mi13:03:172:34:437:227:52
7:52
#8703
35K
21.75 mi13:08:442:40:107:225:27
7:17
#8611
23M
23.00 mi13:18:322:49:587:239:48
7:49
#8525
24M
24.00 mi13:26:212:57:477:247:49
7:49
#8593
40K
24.85 mi13:33:263:04:527:267:05
8:18
#8695
25.2M
25.20 mi13:36:183:07:447:272:52
8:18
#8661
Finish
26.22 mi13:44:283:15:547:298:10
8:01
#8845
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi11904273927399644(Top 34%)1725(Top 14%)1725(Top 32%)
10K6.21 mi3.10 mi11436+4682518+2212518+22111026(Top 39%)2313(Top 19%)2313(Top 42%)
15K9.32 mi3.11 mi10785+6512218+3002218+3009644(Top 34%)1725(Top 14%)1725(Top 32%)
20K12.43 mi3.11 mi10209+5761969+2491969+2498663(Top 30%)1381(Top 11%)1381(Top 25%)
Half13.11 mi0.68 mi10142+671932+371932+379010(Top 32%)1511(Top 12%)1511(Top 28%)
25K15.53 mi2.42 mi9831+3111827+1051827+1058606(Top 30%)1476(Top 12%)1476(Top 27%)
30K18.64 mi3.11 mi9112+7191558+2691558+2696627(Top 23%)884(Top 7%)884(Top 16%)
20M20.00 mi1.36 mi8889+2231490+681490+687083(Top 25%)1183(Top 10%)1183(Top 22%)
21M21.00 mi1.00 mi8703+1861452+381452+386614(Top 23%)1158(Top 9%)1158(Top 21%)
35K21.75 mi0.75 mi8611+921430+221430+227192(Top 25%)1369(Top 11%)1369(Top 25%)
23M23.00 mi1.25 mi8525+861444-141444-148729(Top 31%)2148(Top 18%)2148(Top 39%)
24M24.00 mi1.00 mi8593-681501-571501-579994(Top 35%)2824(Top 23%)2824(Top 52%)
40K24.85 mi0.85 mi8695-1021590-891590-8912117(Top 43%)3990(Top 33%)3990(Top 73%)
25.2M25.20 mi0.35 mi8661+341588+21588+27576(Top 27%)1914(Top 16%)1914(Top 35%)
Finish26.22 mi1.02 mi8845-1841703-1151703-11512977(Top 46%)4413(Top 36%)4413(Top 81%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 34%
×21story building
+97ft-345ft

Overall

9644

Females

1725

F18-39

1725

5K→10K

3.1 - 6.2 mi

Top 39%
×5story building
+79ft-138ft

Overall

11026

Females

2313

F18-39

2313

10K→15K

6.2 - 9.3 mi

Top 34%
×3story building
+67ft-78ft

Overall

9644

Females

1725

F18-39

1725

15K→20K

9.3 - 12.4 mi

Top 30%
×5story building
+106ft-86ft

Overall

8663

Females

1381

F18-39

1381

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

9010

Females

1511

F18-39

1511

Half→25K

13.1 - 15.5 mi

Top 30%
×4story building
+66ft-88ft

Overall

8606

Females

1476

F18-39

1476

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6627

Females

884

F18-39

884

30K→20M

18.6 - 20.0 mi

Top 25%
×5story building
+64ft-50ft

Overall

7083

Females

1183

F18-39

1183

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6614

Females

1158

F18-39

1158

21M→35K

21.0 - 21.8 mi

Top 25%
×7story building
+17ft-86ft

Overall

7192

Females

1369

F18-39

1369

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8729

Females

2148

F18-39

2148

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9994

Females

2824

F18-39

2824

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12117

Females

3990

F18-39

3990

40K→25.2M

24.9 - 25.2 mi

Top 27%
×1story
+13ft-16ft

Overall

7576

Females

1914

F18-39

1914

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12977

Females

4413

F18-39

4413

Passing Analysis

Category:
Athletes Passed
3842*
Passed By
783
Net Change
+3059
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11904
5K → 10K56092+468#11904#11436
10K → 15K66514+651#11436#10785
15K → 20K5826+576#10785#10209
20K → Half747+67#10209#10142
Half → 25K332*21+311#10142#9831
25K → 30K7212+719#9831#9112
30K → 20M23714+223#9112#8889
20M → 21M20317+186#8889#8703
21M → 35K11119+92#8703#8611
35K → 23M15670+86#8611#8525
23M → 24M57125-68#8525#8593
24M → 40K59161-102#8593#8695
40K → 25.2M5218+34#8695#8661
25.2M → Finish33217-184#8661#8845
TOTALS3842*783+3059

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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