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BOSTON MARATHON 2025

Spencer Kirsteatter

Bib: 846•M

WI

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 1%
Gender (Male)
#0 / 16105
Top 2%
Division (M18-39)
#0 / 5642
Top 6%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:50
Rank: #493
Start → 5K
17:50 | 5:44/mi
10K· 6.21 mi
35:34
Rank: #471 (+22)
5K → 10K
17:44 | 5:42/mi
15K· 9.32 mi
53:24
Rank: #467 (+4)
10K → 15K
17:50 | 5:44/mi
20K· 12.43 mi
1:11:19
Rank: #437 (+30)
15K → 20K
17:55 | 5:46/mi
Half· 13.11 mi
1:15:10
Rank: #430 (+7)
20K → Half
3:51 | 5:39/mi
25K· 15.53 mi
1:29:10
Rank: #415 (+15)
Half → 25K
14:00 | 5:46/mi
30K· 18.64 mi
1:47:25
Rank: #383 (+32)
25K → 30K
18:15 | 5:52/mi
20M
1:55:33
Rank: #377 (+6)
30K → 20M
8:08 | 5:59/mi
21M
2:01:56
Rank: #364 (+13)
20M → 21M
6:23 | 6:23/mi
35K· 21.75 mi
2:06:10
Rank: #357 (+7)
21M → 35K
4:14 | 5:40/mi
23M
2:13:47
Rank: #353 (+4)
35K → 23M
7:37 | 6:05/mi
24M
2:19:50
Rank: #354 (-1)
23M → 24M
6:03 | 6:03/mi
40K· 24.85 mi
2:25:23
Rank: #365 (-11)
24M → 40K
5:33 | 6:29/mi
25.2M
2:27:46
Rank: #366 (-1)
40K → 25.2M
2:23 | 6:55/mi
Finish· 26.22 mi
2:34:10
Rank: #385 (-19)
25.2M → Finish
6:24 | 6:17/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:10
Pace5:44 /mi
2nd Half
Distance13.11 mi
Time1:19:00
Pace6:02 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:0317:505:4417:50
5:44
-
10K
6.21 mi10:35:4735:345:4317:44
5:42
-0:02
15K
9.32 mi10:53:3753:245:4417:50
5:44
+0:02
20K
12.43 mi11:11:321:11:195:4417:55
5:46
+0:02
Half
13.11 mi11:15:231:15:105:443:51
5:39
-0:07
25K
15.53 mi11:29:231:29:105:4414:00
5:46
+0:07
30K
18.64 mi11:47:381:47:255:4618:15
5:52
+0:06
20M
20.00 mi11:55:461:55:335:478:08
5:59
+0:07
21M
21.00 mi12:02:092:01:565:486:23
6:23
+0:24
35K
21.75 mi12:06:232:06:105:484:14
5:40
-0:43
23M
23.00 mi12:14:002:13:475:497:37
6:05
+0:25
24M
24.00 mi12:20:032:19:505:506:03
6:03
-0:02
40K
24.85 mi12:25:362:25:235:515:33
6:29
+0:26
25.2M
25.20 mi12:27:592:27:465:522:23
6:55
+0:26
Finish
26.22 mi12:34:232:34:105:536:24
6:17
-0:38

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

5:39 /mi

Average Pace

5:53 /mi

Slowest Pace

6:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

8:05

5% of race

Time at Steady Pace

1:51:42

72% of race

Time at Slower Pace

34:23

22% of race

Average Pace: 5:53 /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 mi10:18:0317:505:4417:50
5:44
#493
10K
6.21 mi10:35:4735:345:4317:44
5:42
#471
15K
9.32 mi10:53:3753:245:4417:50
5:44
#467
20K
12.43 mi11:11:321:11:195:4417:55
5:46
#437
Half
13.11 mi11:15:231:15:105:443:51
5:39
#430
25K
15.53 mi11:29:231:29:105:4414:00
5:46
#415
30K
18.64 mi11:47:381:47:255:4618:15
5:52
#383
20M
20.00 mi11:55:461:55:335:478:08
5:59
#377
21M
21.00 mi12:02:092:01:565:486:23
6:23
#364
35K
21.75 mi12:06:232:06:105:484:14
5:40
#357
23M
23.00 mi12:14:002:13:475:497:37
6:05
#353
24M
24.00 mi12:20:032:19:505:506:03
6:03
#354
40K
24.85 mi12:25:362:25:235:515:33
6:29
#365
25.2M
25.20 mi12:27:592:27:465:522:23
6:55
#366
Finish
26.22 mi12:34:232:34:105:536:24
6:17
#385
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi493455455438(Top 2%)406(Top 3%)406(Top 7%)
10K6.21 mi3.10 mi471+22434+21434+21466(Top 2%)430(Top 3%)430(Top 8%)
15K9.32 mi3.11 mi467+4430+4430+4438(Top 2%)406(Top 3%)406(Top 7%)
20K12.43 mi3.11 mi437+30403+27403+27396(Top 1%)367(Top 2%)367(Top 7%)
Half13.11 mi0.68 mi430+7396+7396+7365(Top 1%)339(Top 2%)339(Top 6%)
25K15.53 mi2.42 mi415+15381+15381+15376(Top 1%)349(Top 2%)349(Top 6%)
30K18.64 mi3.11 mi383+32352+29352+29320(Top 1%)296(Top 2%)296(Top 5%)
20M20.00 mi1.36 mi377+6347+5347+5362(Top 1%)338(Top 2%)338(Top 6%)
21M21.00 mi1.00 mi364+13334+13334+13482(Top 2%)453(Top 3%)453(Top 8%)
35K21.75 mi0.75 mi357+7328+6328+6233(Top 0.8%)213(Top 1%)213(Top 4%)
23M23.00 mi1.25 mi353+4326+2326+2451(Top 2%)424(Top 3%)424(Top 8%)
24M24.00 mi1.00 mi354-1327-1327-1657(Top 2%)615(Top 4%)615(Top 11%)
40K24.85 mi0.85 mi365-11338-11338-111539(Top 5%)1423(Top 9%)1423(Top 25%)
25.2M25.20 mi0.35 mi366-1337+1337+11196(Top 4%)1098(Top 7%)1098(Top 19%)
Finish26.22 mi1.02 mi385-19355-18355-181787(Top 6%)1650(Top 10%)1650(Top 29%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

438

Males

406

M18-39

406

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

466

Males

430

M18-39

430

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

438

Males

406

M18-39

406

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

396

Males

367

M18-39

367

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

365

Males

339

M18-39

339

Half→25K

13.1 - 15.5 mi

Top 1%
×4stories
+66ft-88ft

Overall

376

Males

349

M18-39

349

25K→30K

15.5 - 18.6 mi

Top 1%
×9stories
+181ft-148ft

Overall

320

Males

296

M18-39

296

30K→20M

18.6 - 20.0 mi

Top 1%
×5stories
+64ft-50ft

Overall

362

Males

338

M18-39

338

20M→21M

20.0 - 21.0 mi

Top 2%
×8stories
+106ft-24ft

Overall

482

Males

453

M18-39

453

21M→35K

21.0 - 21.8 mi

Top 0.8%
×7stories
+17ft-86ft

Overall

233

Males

213

M18-39

213

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

451

Males

424

M18-39

424

23M→24M

23.0 - 24.0 mi

Top 2%
×6stories
+12ft-82ft

Overall

657

Males

615

M18-39

615

24M→40K

24.0 - 24.9 mi

Top 5%
×1story
+6ft-20ft

Overall

1539

Males

1423

M18-39

1423

40K→25.2M

24.9 - 25.2 mi

Top 4%
×1story
+13ft-16ft

Overall

1196

Males

1098

M18-39

1098

25.2M→Finish

25.2 - 26.2 mi

Top 6%
×2stories
+22ft-21ft

Overall

1787

Males

1650

M18-39

1650

Passing Analysis

Category:
Athletes Passed
232
Passed By
124
Net Change
+108
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#493
5K → 10K3715+22#493#471
10K → 15K2319+4#471#467
15K → 20K388+30#467#437
20K → Half70+7#437#430
Half → 25K194+15#430#415
25K → 30K364+32#415#383
30K → 20M137+6#383#377
20M → 21M141+13#377#364
21M → 35K81+7#364#357
35K → 23M1713+4#357#353
23M → 24M78-1#353#354
24M → 40K314-11#354#365
40K → 25.2M34-1#365#366
25.2M → Finish726-19#366#385
TOTALS232124+108
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing