Boston Marathon logo
BOSTON MARATHON 2025

Amy Neilson

Bib: 9325•F

MO

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Top 21%
Gender (Female)
#0 / 12228
Top 5%
Division (F18-39)
#0 / 5469
Top 10%
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
7:04/mi
21:57
↑ 97↓ 3451.5%
10K· 6.21 mi
6:58/mi
43:35
↑ 79↓ 1380.4%
15K· 9.32 mi
6:56/mi
1:05:08
↑ 67↓ 78
20K· 12.43 mi
6:57/mi
1:26:45
↑ 106↓ 860.1%
Half· 13.11 mi
6:50/mi
1:31:25
↑ 19↓ 370.5%
25K· 15.53 mi
7:05/mi
1:48:36
↑ 66↓ 880.2%
30K· 18.64 mi
7:15/mi
2:11:06
↑ 181↓ 1480.2%
20M
7:14/mi
2:20:56
↑ 64↓ 500.2%
21M
7:32/mi
2:28:28
↑ 106↓ 241.6%
35K· 21.75 mi
7:01/mi
2:33:43
↑ 17↓ 861.7%
23M
7:14/mi
2:42:46
↑ 23↓ 630.6%
24M
7:00/mi
2:49:46
↓ 821.3%
40K· 24.85 mi
7:09/mi
2:55:53
↓ 200.3%
25.2M
7:38/mi
2:58:31
↑ 13↓ 160.2%
Finish· 26.22 mi
6:49/mi
3:05:28
↑ 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
Time1:31:25
Pace6:58 /mi
2nd Half
Distance13.11 mi
Time1:34:03
Pace7:10 /mi
📊Positive Split: 2.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:47:2321:577:0421:57
7:04
-
10K
6.21 mi11:09:0143:357:0121:38
6:58
-0:06
15K
9.32 mi11:30:341:05:086:5921:33
6:56
-0:02
20K
12.43 mi11:52:111:26:456:5921:37
6:57
+0:01
Half
13.11 mi11:56:511:31:256:584:40
6:50
-0:07
25K
15.53 mi12:14:021:48:366:5917:11
7:05
+0:15
30K
18.64 mi12:36:322:11:067:0222:30
7:15
+0:10
20M
20.00 mi12:46:222:20:567:039:50
7:14
-0:01
21M
21.00 mi12:53:542:28:287:047:32
7:32
+0:18
35K
21.75 mi12:59:092:33:437:045:15
7:01
-0:31
23M
23.00 mi13:08:122:42:467:059:03
7:14
+0:13
24M
24.00 mi13:15:122:49:467:047:00
7:00
-0:14
40K
24.85 mi13:21:192:55:537:056:07
7:09
+0:09
25.2M
25.20 mi13:23:572:58:317:052:38
7:38
+0:29
Finish
26.22 mi13:30:543:05:287:056:57
6:49
-0:49

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

6:49 /mi

Average Pace

7:05 /mi

Slowest Pace

7:38 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:18

95% of race

Time at Steady Pace

10:10

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:04 /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 mi10:47:2321:577:0421:57
7:04
#8355
10K
6.21 mi11:09:0143:357:0121:38
6:58
#7960
15K
9.32 mi11:30:341:05:086:5921:33
6:56
#7680
20K
12.43 mi11:52:111:26:456:5921:37
6:57
#7369
Half
13.11 mi11:56:511:31:256:584:40
6:50
#7317
25K
15.53 mi12:14:021:48:366:5917:11
7:05
#7202
30K
18.64 mi12:36:322:11:067:0222:30
7:15
#6876
20M
20.00 mi12:46:222:20:567:039:50
7:14
#6695
21M
21.00 mi12:53:542:28:287:047:32
7:32
#6503
35K
21.75 mi12:59:092:33:437:045:15
7:01
#6427
23M
23.00 mi13:08:122:42:467:059:03
7:14
#6287
24M
24.00 mi13:15:122:49:467:047:00
7:00
#6148
40K
24.85 mi13:21:192:55:537:056:07
7:09
#6033
25.2M
25.20 mi13:23:572:58:317:052:38
7:38
#5979
Finish
26.22 mi13:30:543:05:287:056:57
6:49
#5844
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8355111211127216(Top 25%)785(Top 6%)785(Top 14%)
10K6.21 mi3.10 mi7960+395980+132980+1327687(Top 27%)896(Top 7%)896(Top 16%)
15K9.32 mi3.11 mi7680+280898+82898+827216(Top 25%)785(Top 6%)785(Top 14%)
20K12.43 mi3.11 mi7369+311816+82816+826637(Top 23%)689(Top 6%)689(Top 13%)
Half13.11 mi0.68 mi7317+52802+14802+146547(Top 23%)668(Top 5%)668(Top 12%)
25K15.53 mi2.42 mi7202+115785+17785+176897(Top 24%)830(Top 7%)830(Top 15%)
30K18.64 mi3.11 mi6876+326746+39746+396135(Top 22%)708(Top 6%)708(Top 13%)
20M20.00 mi1.36 mi6695+181723+23723+235435(Top 19%)619(Top 5%)619(Top 11%)
21M21.00 mi1.00 mi6503+192698+25698+254808(Top 17%)562(Top 5%)562(Top 10%)
35K21.75 mi0.75 mi6427+76689+9689+95506(Top 19%)756(Top 6%)756(Top 14%)
23M23.00 mi1.25 mi6287+140677+12677+125067(Top 18%)688(Top 6%)688(Top 13%)
24M24.00 mi1.00 mi6148+139658+19658+194663(Top 16%)624(Top 5%)624(Top 11%)
40K24.85 mi0.85 mi6033+115647+11647+114826(Top 17%)722(Top 6%)722(Top 13%)
25.2M25.20 mi0.35 mi5979+54640+7640+74115(Top 14%)593(Top 5%)593(Top 11%)
Finish26.22 mi1.02 mi5844+135632+8632+84650(Top 16%)745(Top 6%)745(Top 14%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21story building
+97ft-345ft

Overall

7216

Females

785

F18-39

785

5K→10K

3.1 - 6.2 mi

Top 27%
×5story building
+79ft-138ft

Overall

7687

Females

896

F18-39

896

10K→15K

6.2 - 9.3 mi

Top 25%
×3story building
+67ft-78ft

Overall

7216

Females

785

F18-39

785

15K→20K

9.3 - 12.4 mi

Top 23%
×5story building
+106ft-86ft

Overall

6637

Females

689

F18-39

689

20K→Half

12.4 - 13.1 mi

Top 23%
×2story building
+19ft-37ft

Overall

6547

Females

668

F18-39

668

Half→25K

13.1 - 15.5 mi

Top 24%
×4story building
+66ft-88ft

Overall

6897

Females

830

F18-39

830

25K→30K

15.5 - 18.6 mi

Top 22%
×9story building
+181ft-148ft

Overall

6135

Females

708

F18-39

708

30K→20M

18.6 - 20.0 mi

Top 19%
×5story building
+64ft-50ft

Overall

5435

Females

619

F18-39

619

20M→21M

20.0 - 21.0 mi

Top 17%
×8story building
+106ft-24ft

Overall

4808

Females

562

F18-39

562

21M→35K

21.0 - 21.8 mi

Top 19%
×7story building
+17ft-86ft

Overall

5506

Females

756

F18-39

756

35K→23M

21.8 - 23.0 mi

Top 18%
×5story building
+23ft-63ft

Overall

5067

Females

688

F18-39

688

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4663

Females

624

F18-39

624

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4826

Females

722

F18-39

722

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

4115

Females

593

F18-39

593

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2story building
+22ft-21ft

Overall

4650

Females

745

F18-39

745

Passing Analysis

Category:
Athletes Passed
2788
Passed By
277
Net Change
+2511
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8355
5K → 10K47176+395#8355#7960
10K → 15K31131+280#7960#7680
15K → 20K3209+311#7680#7369
20K → Half564+52#7369#7317
Half → 25K16550+115#7317#7202
25K → 30K36539+326#7202#6876
30K → 20M1876+181#6876#6695
20M → 21M1986+192#6695#6503
21M → 35K8812+76#6503#6427
35K → 23M15818+140#6427#6287
23M → 24M1434+139#6287#6148
24M → 40K1205+115#6148#6033
40K → 25.2M573+54#6033#5979
25.2M → Finish14914+135#5979#5844
TOTALS2788277+2511
📊

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