Boston Marathon logo
BOSTON MARATHON 2025

James Ducker

Bib: 25570•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M75-79)
#0 / 52
Top 27%
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
8:44/mi
27:08
↑ 97↓ 3451.5%
10K· 6.21 mi
9:07/mi
55:29
↑ 79↓ 1380.4%
15K· 9.32 mi
9:20/mi
1:24:28
↑ 67↓ 78
20K· 12.43 mi
9:44/mi
1:54:43
↑ 106↓ 860.1%
Half· 13.11 mi
9:40/mi
2:01:19
↑ 19↓ 370.5%
25K· 15.53 mi
10:06/mi
2:25:48
↑ 66↓ 880.2%
30K· 18.64 mi
10:34/mi
2:58:37
↑ 181↓ 1480.2%
20M
11:08/mi
3:13:45
↑ 64↓ 500.2%
21M
11:29/mi
3:25:14
↑ 106↓ 241.6%
35K· 21.75 mi
10:38/mi
3:33:11
↑ 17↓ 861.7%
23M
10:59/mi
3:46:56
↑ 23↓ 630.6%
24M
10:31/mi
3:57:27
↓ 821.3%
40K· 24.85 mi
10:50/mi
4:06:43
↓ 200.3%
25.2M
11:19/mi
4:10:37
↑ 13↓ 160.2%
Finish· 26.22 mi
9:53/mi
4:20:41
↑ 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
Time2:01:19
Pace9:15 /mi
2nd Half
Distance13.11 mi
Time2:19:22
Pace10:38 /mi
📊Positive Split: 14.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:42:2427:088:4427:08
8:44
-
10K
6.21 mi12:10:4555:298:5628:21
9:07
+0:23
15K
9.32 mi12:39:441:24:289:0428:59
9:20
+0:13
20K
12.43 mi13:09:591:54:439:1430:15
9:44
+0:24
Half
13.11 mi13:16:352:01:199:156:36
9:40
-0:04
25K
15.53 mi13:41:042:25:489:2324:29
10:06
+0:26
30K
18.64 mi14:13:532:58:379:3532:49
10:34
+0:28
20M
20.00 mi14:29:013:13:459:4115:08
11:08
+0:34
21M
21.00 mi14:40:303:25:149:4611:29
11:29
+0:21
35K
21.75 mi14:48:273:33:119:487:57
10:38
-0:51
23M
23.00 mi15:02:123:46:569:5213:45
10:59
+0:21
24M
24.00 mi15:12:433:57:279:5410:31
10:31
-0:28
40K
24.85 mi15:21:594:06:439:569:16
10:50
+0:19
25.2M
25.20 mi15:25:534:10:379:573:54
11:19
+0:29
Finish
26.22 mi15:35:574:20:419:5710:04
9:53
-1:26

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

8:44 /mi

Average Pace

9:57 /mi

Slowest Pace

11:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:35:52

60% of race

Time at Steady Pace

1:00:33

23% of race

Time at Slower Pace

44:16

17% of race

Average Pace: 9:57 /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 mi11:42:2427:088:4427:08
8:44
#21158
10K
6.21 mi12:10:4555:298:5628:21
9:07
#22105
15K
9.32 mi12:39:441:24:289:0428:59
9:20
#22546
20K
12.43 mi13:09:591:54:439:1430:15
9:44
#22917
Half
13.11 mi13:16:352:01:199:156:36
9:40
#22978
25K
15.53 mi13:41:042:25:489:2324:29
10:06
#23076
30K
18.64 mi14:13:532:58:379:3532:49
10:34
#23042
20M
20.00 mi14:29:013:13:459:4115:08
11:08
#23117
21M
21.00 mi14:40:303:25:149:4611:29
11:29
#23079
35K
21.75 mi14:48:273:33:119:487:57
10:38
#23083
23M
23.00 mi15:02:123:46:569:5213:45
10:59
#23100
24M
24.00 mi15:12:433:57:279:5410:31
10:31
#23081
40K
24.85 mi15:21:594:06:439:569:16
10:50
#23066
25.2M
25.20 mi15:25:534:10:379:573:54
11:19
#23051
Finish
26.22 mi15:35:574:20:419:5710:04
9:53
#23028
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM75-79Seg. OverallSeg. MalesSeg. M75-79
5K3.11 mi3.11 mi21158129331293323293(Top 82%)13972(Top 87%)13972(Top 26869%)
10K6.21 mi3.10 mi22105-94713373-44013373-44022911(Top 81%)13773(Top 86%)13773(Top 26487%)
15K9.32 mi3.11 mi22546-44113604-23113604-23123293(Top 82%)13972(Top 87%)13972(Top 26869%)
20K12.43 mi3.11 mi22917-37113775-17113775-17123591(Top 83%)14053(Top 87%)14053(Top 27025%)
Half13.11 mi0.68 mi22978-6113804-2913804-2924012(Top 85%)14233(Top 88%)14233(Top 27371%)
25K15.53 mi2.42 mi23076-9813831-2713831-2723497(Top 83%)13957(Top 87%)13957(Top 26840%)
30K18.64 mi3.11 mi23042+3413768+6313768+6323077(Top 81%)13655(Top 85%)13655(Top 26260%)
20M20.00 mi1.36 mi23117-7513785-1713785-1723856(Top 84%)13915(Top 86%)13915(Top 26760%)
21M21.00 mi1.00 mi23079+3813754+3113754+3122583(Top 80%)13239(Top 82%)13239(Top 25460%)
35K21.75 mi0.75 mi23083-413742+1213742+1223423(Top 82%)13601(Top 84%)13601(Top 26156%)
23M23.00 mi1.25 mi23100-1713721+2113721+2123175(Top 82%)13415(Top 83%)13415(Top 25798%)
24M24.00 mi1.00 mi23081+1913687+3413687+3422859(Top 80%)13229(Top 82%)13229(Top 25440%)
40K24.85 mi0.85 mi23066+1513662+2513662+2522758(Top 80%)13118(Top 81%)13118(Top 25227%)
25.2M25.20 mi0.35 mi23051+1513654+813654+821534(Top 76%)12557(Top 78%)12557(Top 24148%)
Finish26.22 mi1.02 mi23028+2313635+1913635+1922551(Top 79%)13055(Top 81%)13055(Top 25106%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 82%
×21story building
+97ft-345ft

Overall

23293

Males

13972

M75-79

13972

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

22911

Males

13773

M75-79

13773

10K→15K

6.2 - 9.3 mi

Top 82%
×3story building
+67ft-78ft

Overall

23293

Males

13972

M75-79

13972

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

23591

Males

14053

M75-79

14053

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

24012

Males

14233

M75-79

14233

Half→25K

13.1 - 15.5 mi

Top 83%
×4story building
+66ft-88ft

Overall

23497

Males

13957

M75-79

13957

25K→30K

15.5 - 18.6 mi

Top 81%
×9story building
+181ft-148ft

Overall

23077

Males

13655

M75-79

13655

30K→20M

18.6 - 20.0 mi

Top 84%
×5story building
+64ft-50ft

Overall

23856

Males

13915

M75-79

13915

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

22583

Males

13239

M75-79

13239

21M→35K

21.0 - 21.8 mi

Top 82%
×7story building
+17ft-86ft

Overall

23423

Males

13601

M75-79

13601

35K→23M

21.8 - 23.0 mi

Top 82%
×5story building
+23ft-63ft

Overall

23175

Males

13415

M75-79

13415

23M→24M

23.0 - 24.0 mi

Top 80%
×6story building
+12ft-82ft

Overall

22859

Males

13229

M75-79

13229

24M→40K

24.0 - 24.9 mi

Top 80%
×1story
+6ft-20ft

Overall

22758

Males

13118

M75-79

13118

40K→25.2M

24.9 - 25.2 mi

Top 76%
×1story
+13ft-16ft

Overall

21534

Males

12557

M75-79

12557

25.2M→Finish

25.2 - 26.2 mi

Top 79%
×2story building
+22ft-21ft

Overall

22551

Males

13055

M75-79

13055

Passing Analysis

Category:
Athletes Passed
937
Passed By
2807
Net Change
-1870
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21158
5K → 10K541001-947#21158#22105
10K → 15K76517-441#22105#22546
15K → 20K83454-371#22546#22917
20K → Half1980-61#22917#22978
Half → 25K100198-98#22978#23076
25K → 30K184150+34#23076#23042
30K → 20M54129-75#23042#23117
20M → 21M7739+38#23117#23079
21M → 35K3943-4#23079#23083
35K → 23M6178-17#23083#23100
23M → 24M6243+19#23100#23081
24M → 40K5944+15#23081#23066
40K → 25.2M249+15#23066#23051
25.2M → Finish4522+23#23051#23028
TOTALS9372807-1870
📊

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