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BOSTON MARATHON 2025

Kyle Bystrom

Bib: 957•M

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 4%
Gender (Male)
#0 / 16105
Top 7%
Division (M18-39)
#0 / 5642
Top 17%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
17:58
Rank: #581
Start → 5K
17:58 | 5:47/mi
10K· 6.21 mi
35:43
Rank: #526 (+55)
5K → 10K
17:45 | 5:43/mi
15K· 9.32 mi
53:34
Rank: #502 (+24)
10K → 15K
17:51 | 5:45/mi
20K· 12.43 mi
1:11:28
Rank: #458 (+44)
15K → 20K
17:54 | 5:46/mi
Half· 13.11 mi
1:15:20
Rank: #448 (+10)
20K → Half
3:52 | 5:40/mi
25K· 15.53 mi
1:29:20
Rank: #426 (+22)
Half → 25K
14:00 | 5:46/mi
30K· 18.64 mi
1:48:33
Rank: #472 (-46)
25K → 30K
19:13 | 6:11/mi
20M
1:57:15
Rank: #492 (-20)
30K → 20M
8:42 | 6:24/mi
21M
2:04:10
Rank: #529 (-37)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:09:05
Rank: #564 (-35)
21M → 35K
4:55 | 6:34/mi
23M
2:17:50
Rank: #636 (-72)
35K → 23M
8:45 | 6:59/mi
24M
2:25:13
Rank: #733 (-97)
23M → 24M
7:23 | 7:23/mi
40K· 24.85 mi
2:32:08
Rank: #895 (-162)
24M → 40K
6:55 | 8:05/mi
25.2M
2:35:30
Rank: #988 (-93)
40K → 25.2M
3:22 | 9:46/mi
Finish· 26.22 mi
2:43:43
Rank: #1218 (-230)
25.2M → Finish
8:13 | 8:04/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:15:20
Pace5:45 /mi
2nd Half
Distance13.11 mi
Time1:28:23
Pace6:45 /mi
📊Positive Split: 17.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:2317:585:4717:58
5:47
-
10K
6.21 mi10:36:0835:435:4517:45
5:43
-0:04
15K
9.32 mi10:53:5953:345:4517:51
5:45
+0:02
20K
12.43 mi11:11:531:11:285:4517:54
5:46
+0:01
Half
13.11 mi11:15:451:15:205:453:52
5:40
-0:06
25K
15.53 mi11:29:451:29:205:4514:00
5:46
+0:06
30K
18.64 mi11:48:581:48:335:4919:13
6:11
+0:25
20M
20.00 mi11:57:401:57:155:528:42
6:24
+0:13
21M
21.00 mi12:04:352:04:105:556:55
6:55
+0:31
35K
21.75 mi12:09:302:09:055:564:55
6:34
-0:21
23M
23.00 mi12:18:152:17:506:008:45
6:59
+0:25
24M
24.00 mi12:25:382:25:136:037:23
7:23
+0:24
40K
24.85 mi12:32:332:32:086:076:55
8:05
+0:42
25.2M
25.20 mi12:35:552:35:306:103:22
9:46
+1:41
Finish
26.22 mi12:44:082:43:436:158:13
8:04
-1:42

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

5:40 /mi

Average Pace

6:15 /mi

Slowest Pace

9:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:29:20

55% of race

Time at Steady Pace

39:45

24% of race

Time at Slower Pace

34:38

21% of race

Average Pace: 6:15 /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 mi10:18:2317:585:4717:58
5:47
#581
10K
6.21 mi10:36:0835:435:4517:45
5:43
#526
15K
9.32 mi10:53:5953:345:4517:51
5:45
#502
20K
12.43 mi11:11:531:11:285:4517:54
5:46
#458
Half
13.11 mi11:15:451:15:205:453:52
5:40
#448
25K
15.53 mi11:29:451:29:205:4514:00
5:46
#426
30K
18.64 mi11:48:581:48:335:4919:13
6:11
#472
20M
20.00 mi11:57:401:57:155:528:42
6:24
#492
21M
21.00 mi12:04:352:04:105:556:55
6:55
#529
35K
21.75 mi12:09:302:09:055:564:55
6:34
#564
23M
23.00 mi12:18:152:17:506:008:45
6:59
#636
24M
24.00 mi12:25:382:25:136:037:23
7:23
#733
40K
24.85 mi12:32:332:32:086:076:55
8:05
#895
25.2M
25.20 mi12:35:552:35:306:103:22
9:46
#988
Finish
26.22 mi12:44:082:43:436:158:13
8:04
#1218
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi581539539448(Top 2%)416(Top 3%)416(Top 7%)
10K6.21 mi3.10 mi526+55488+51488+51475(Top 2%)439(Top 3%)439(Top 8%)
15K9.32 mi3.11 mi502+24465+23465+23448(Top 2%)416(Top 3%)416(Top 7%)
20K12.43 mi3.11 mi458+44422+43422+43392(Top 1%)363(Top 2%)363(Top 6%)
Half13.11 mi0.68 mi448+10413+9413+9396(Top 1%)369(Top 2%)369(Top 7%)
25K15.53 mi2.42 mi426+22392+21392+21383(Top 1%)356(Top 2%)356(Top 6%)
30K18.64 mi3.11 mi472-46437-45437-45877(Top 3%)821(Top 5%)821(Top 15%)
20M20.00 mi1.36 mi492-20453-16453-161249(Top 4%)1180(Top 7%)1180(Top 21%)
21M21.00 mi1.00 mi529-37486-33486-331922(Top 7%)1811(Top 11%)1811(Top 32%)
35K21.75 mi0.75 mi564-35519-33519-332777(Top 10%)2559(Top 16%)2559(Top 45%)
23M23.00 mi1.25 mi636-72589-70589-703652(Top 13%)3296(Top 20%)3296(Top 58%)
24M24.00 mi1.00 mi733-97684-95684-956886(Top 24%)5439(Top 34%)5439(Top 96%)
40K24.85 mi0.85 mi895-162838-154838-15410728(Top 38%)7406(Top 46%)7406(Top 131%)
25.2M25.20 mi0.35 mi988-93930-92930-9215814(Top 56%)9751(Top 61%)9751(Top 173%)
Finish26.22 mi1.02 mi1218-2301143-2131143-21313261(Top 47%)8627(Top 54%)8627(Top 153%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 2%
×21stories
+97ft-345ft

Overall

448

Males

416

M18-39

416

5K→10K

3.1 - 6.2 mi

Top 2%
×5stories
+79ft-138ft

Overall

475

Males

439

M18-39

439

10K→15K

6.2 - 9.3 mi

Top 2%
×3stories
+67ft-78ft

Overall

448

Males

416

M18-39

416

15K→20K

9.3 - 12.4 mi

Top 1%
×5stories
+106ft-86ft

Overall

392

Males

363

M18-39

363

20K→Half

12.4 - 13.1 mi

Top 1%
×2stories
+19ft-37ft

Overall

396

Males

369

M18-39

369

Half→25K

13.1 - 15.5 mi

Top 1%
×4stories
+66ft-88ft

Overall

383

Males

356

M18-39

356

25K→30K

15.5 - 18.6 mi

Top 3%
×9stories
+181ft-148ft

Overall

877

Males

821

M18-39

821

30K→20M

18.6 - 20.0 mi

Top 4%
×5stories
+64ft-50ft

Overall

1249

Males

1180

M18-39

1180

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1922

Males

1811

M18-39

1811

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2777

Males

2559

M18-39

2559

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3652

Males

3296

M18-39

3296

23M→24M

23.0 - 24.0 mi

Top 24%
×6stories
+12ft-82ft

Overall

6886

Males

5439

M18-39

5439

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10728

Males

7406

M18-39

7406

40K→25.2M

24.9 - 25.2 mi

Top 56%
×1story
+13ft-16ft

Overall

15814

Males

9751

M18-39

9751

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2stories
+22ft-21ft

Overall

13261

Males

8627

M18-39

8627

Passing Analysis

Category:
Athletes Passed
206
Passed By
843
Net Change
-637
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#581
5K → 10K6712+55#581#526
10K → 15K3511+24#526#502
15K → 20K462+44#502#458
20K → Half122+10#458#448
Half → 25K220+22#448#426
25K → 30K955-46#426#472
30K → 20M424-20#472#492
20M → 21M239-37#492#529
21M → 35K338-35#529#564
35K → 23M577-72#564#636
23M → 24M097-97#636#733
24M → 40K0162-162#733#895
40K → 25.2M194-93#895#988
25.2M → Finish0230-230#988#1218
TOTALS206843-637
📊

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