Boston Marathon logo
BOSTON MARATHON 2025

Zak Stoddard

Bib: 31523•M

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 28404
Gender (Male)
#0 / 16105
Division (M18-39)
#0 / 5642
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
10:20/mi
32:06
↑ 97↓ 3451.5%
10K· 6.21 mi
10:39/mi
1:05:11
↑ 79↓ 1380.4%
15K· 9.32 mi
12:51/mi
1:45:07
↑ 67↓ 78
20K· 12.43 mi
13:09/mi
2:25:58
↑ 106↓ 860.1%
Half· 13.11 mi
11:24/mi
2:33:45
↑ 19↓ 370.5%
25K· 15.53 mi
13:34/mi
3:06:39
↑ 66↓ 880.2%
30K· 18.64 mi
13:48/mi
3:49:31
↑ 181↓ 1480.2%
20M
12:55/mi
4:07:04
↑ 64↓ 500.2%
21M
14:30/mi
4:21:34
↑ 106↓ 241.6%
35K· 21.75 mi
12:31/mi
4:30:56
↑ 17↓ 861.7%
23M
12:59/mi
4:47:11
↑ 23↓ 630.6%
24M
12:35/mi
4:59:46
↓ 821.3%
40K· 24.85 mi
13:20/mi
5:11:10
↓ 200.3%
25.2M
14:36/mi
5:16:12
↑ 13↓ 160.2%
Finish· 26.22 mi
11:58/mi
5:28:24
↑ 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
Time2:33:45
Pace11:44 /mi
2nd Half
Distance13.11 mi
Time2:54:39
Pace13:19 /mi
📊Positive Split: 13.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:53:4032:0610:2032:06
10:20
-
10K
6.21 mi12:26:451:05:1110:2933:05
10:39
+0:19
15K
9.32 mi13:06:411:45:0711:1739:56
12:51
+2:12
20K
12.43 mi13:47:322:25:5811:4540:51
13:09
+0:18
Half
13.11 mi13:55:192:33:4511:447:47
11:24
-1:45
25K
15.53 mi14:28:133:06:3912:0132:54
13:34
+2:10
30K
18.64 mi15:11:053:49:3112:1942:52
13:48
+0:14
20M
20.00 mi15:28:384:07:0412:2117:33
12:55
-0:53
21M
21.00 mi15:43:084:21:3412:2714:30
14:30
+1:35
35K
21.75 mi15:52:304:30:5612:279:22
12:31
-1:59
23M
23.00 mi16:08:454:47:1112:2916:15
12:59
+0:28
24M
24.00 mi16:21:204:59:4612:2912:35
12:35
-0:24
40K
24.85 mi16:32:445:11:1012:3111:24
13:20
+0:45
25.2M
25.20 mi16:37:465:16:1212:335:02
14:36
+1:16
Finish
26.22 mi16:49:585:28:2412:3212:12
11:58
-2:38

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

10:20 /mi

Average Pace

12:32 /mi

Slowest Pace

14:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:25:10

26% of race

Time at Steady Pace

2:27:56

45% of race

Time at Slower Pace

1:35:18

29% of race

Average Pace: 12:31 /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 mi11:53:4032:0610:2032:06
10:20
#26370
10K
6.21 mi12:26:451:05:1110:2933:05
10:39
#26469
15K
9.32 mi13:06:411:45:0711:1739:56
12:51
#27411
20K
12.43 mi13:47:322:25:5811:4540:51
13:09
#27617
Half
13.11 mi13:55:192:33:4511:447:47
11:24
#27581
25K
15.53 mi14:28:133:06:3912:0132:54
13:34
#27609
30K
18.64 mi15:11:053:49:3112:1942:52
13:48
#27584
20M
20.00 mi15:28:384:07:0412:2117:33
12:55
#27503
21M
21.00 mi15:43:084:21:3412:2714:30
14:30
#27477
35K
21.75 mi15:52:304:30:5612:279:22
12:31
#27458
23M
23.00 mi16:08:454:47:1112:2916:15
12:59
#27420
24M
24.00 mi16:21:204:59:4612:2912:35
12:35
#27396
40K
24.85 mi16:32:445:11:1012:3111:24
13:20
#27368
25.2M
25.20 mi16:37:465:16:1212:335:02
14:36
#27367
Finish
26.22 mi16:49:585:28:2412:3212:12
11:58
#27368
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi26370153451534528115(Top 99%)15992(Top 99%)15992(Top 283%)
10K6.21 mi3.10 mi26469-9915366-2115366-2126524(Top 93%)15375(Top 95%)15375(Top 273%)
15K9.32 mi3.11 mi27411-94215743-37715743-37728115(Top 99%)15992(Top 99%)15992(Top 283%)
20K12.43 mi3.11 mi27617-20615805-6215805-6227899(Top 98%)15897(Top 99%)15897(Top 282%)
Half13.11 mi0.68 mi27581+3615792+1315792+1326981(Top 95%)15514(Top 96%)15514(Top 275%)
25K15.53 mi2.42 mi27609-2815799-715799-727651(Top 97%)15781(Top 98%)15781(Top 280%)
30K18.64 mi3.11 mi27584+2515767+3215767+3227364(Top 96%)15601(Top 97%)15601(Top 277%)
20M20.00 mi1.36 mi27503+8115719+4815719+4826364(Top 93%)15094(Top 94%)15094(Top 268%)
21M21.00 mi1.00 mi27477+2615710+915710+926713(Top 94%)15218(Top 94%)15218(Top 270%)
35K21.75 mi0.75 mi27458+1915700+1015700+1026487(Top 93%)15091(Top 94%)15091(Top 267%)
23M23.00 mi1.25 mi27420+3815680+2015680+2026353(Top 93%)15014(Top 93%)15014(Top 266%)
24M24.00 mi1.00 mi27396+2415664+1615664+1626418(Top 93%)15023(Top 93%)15023(Top 266%)
40K24.85 mi0.85 mi27368+2815642+2215642+2226624(Top 94%)15099(Top 94%)15099(Top 268%)
25.2M25.20 mi0.35 mi27367+115639+315639+326832(Top 94%)15183(Top 94%)15183(Top 269%)
Finish26.22 mi1.02 mi27368-115645-615645-626764(Top 94%)15183(Top 94%)15183(Top 269%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 99%
×21story building
+97ft-345ft

Overall

28115

Males

15992

M18-39

15992

5K→10K

3.1 - 6.2 mi

Top 93%
×5story building
+79ft-138ft

Overall

26524

Males

15375

M18-39

15375

10K→15K

6.2 - 9.3 mi

Top 99%
×3story building
+67ft-78ft

Overall

28115

Males

15992

M18-39

15992

15K→20K

9.3 - 12.4 mi

Top 98%
×5story building
+106ft-86ft

Overall

27899

Males

15897

M18-39

15897

20K→Half

12.4 - 13.1 mi

Top 95%
×2story building
+19ft-37ft

Overall

26981

Males

15514

M18-39

15514

Half→25K

13.1 - 15.5 mi

Top 97%
×4story building
+66ft-88ft

Overall

27651

Males

15781

M18-39

15781

25K→30K

15.5 - 18.6 mi

Top 96%
×9story building
+181ft-148ft

Overall

27364

Males

15601

M18-39

15601

30K→20M

18.6 - 20.0 mi

Top 93%
×5story building
+64ft-50ft

Overall

26364

Males

15094

M18-39

15094

20M→21M

20.0 - 21.0 mi

Top 94%
×8story building
+106ft-24ft

Overall

26713

Males

15218

M18-39

15218

21M→35K

21.0 - 21.8 mi

Top 93%
×7story building
+17ft-86ft

Overall

26487

Males

15091

M18-39

15091

35K→23M

21.8 - 23.0 mi

Top 93%
×5story building
+23ft-63ft

Overall

26353

Males

15014

M18-39

15014

23M→24M

23.0 - 24.0 mi

Top 93%
×6story building
+12ft-82ft

Overall

26418

Males

15023

M18-39

15023

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

26624

Males

15099

M18-39

15099

40K→25.2M

24.9 - 25.2 mi

Top 94%
×1story
+13ft-16ft

Overall

26832

Males

15183

M18-39

15183

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

26764

Males

15183

M18-39

15183

Passing Analysis

Category:
Athletes Passed
581
Passed By
1579
Net Change
-998
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26370
5K → 10K122221-99#26370#26469
10K → 15K5947-942#26469#27411
15K → 20K15221-206#27411#27617
20K → Half382+36#27617#27581
Half → 25K4876-28#27581#27609
25K → 30K7348+25#27609#27584
30K → 20M832+81#27584#27503
20M → 21M326+26#27503#27477
21M → 35K245+19#27477#27458
35K → 23M479+38#27458#27420
23M → 24M3511+24#27420#27396
24M → 40K379+28#27396#27368
40K → 25.2M87+1#27368#27367
25.2M → Finish1415-1#27367#27368
TOTALS5811579-998
📊

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