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BOSTON MARATHON 2025

Brian Kemp

Bib: 12072•M

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 27%
Gender (Male)
#0 / 16105
Top 40%
Masters (Masters Men)
#0 / 10463
Top 27%
Division (M50-54)
#0 / 1996
Top 24%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:27
Rank: #9669
Start → 5K
22:27 | 7:14/mi
10K· 6.21 mi
45:28
Rank: #10465 (-796)
5K → 10K
23:01 | 7:25/mi
15K· 9.32 mi
1:08:36
Rank: #10711 (-246)
10K → 15K
23:08 | 7:27/mi
20K· 12.43 mi
1:31:42
Rank: #10571 (+140)
15K → 20K
23:06 | 7:26/mi
Half· 13.11 mi
1:36:35
Rank: #10460 (+111)
20K → Half
4:53 | 7:09/mi
25K· 15.53 mi
1:54:07
Rank: #9960 (+500)
Half → 25K
17:32 | 7:14/mi
30K· 18.64 mi
2:17:26
Rank: #9461 (+499)
25K → 30K
23:19 | 7:30/mi
20M
2:27:33
Rank: #9203 (+258)
30K → 20M
10:07 | 7:27/mi
21M
2:35:23
Rank: #8986 (+217)
20M → 21M
7:50 | 7:50/mi
35K· 21.75 mi
2:40:45
Rank: #8828 (+158)
21M → 35K
5:22 | 7:10/mi
23M
2:49:51
Rank: #8485 (+343)
35K → 23M
9:06 | 7:16/mi
24M
2:56:46
Rank: #8219 (+266)
23M → 24M
6:55 | 6:55/mi
40K· 24.85 mi
3:02:52
Rank: #8041 (+178)
24M → 40K
6:06 | 7:08/mi
25.2M
3:05:30
Rank: #7933 (+108)
40K → 25.2M
2:38 | 7:38/mi
Finish· 26.22 mi
3:12:18
Rank: #7686 (+247)
25.2M → Finish
6:48 | 6:40/mi

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:36:35
Pace7:22 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:35:43
Pace7:18 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:1122:277:1422:27
7:14
-
10K
6.21 mi11:13:1245:287:1923:01
7:25
+0:11
15K
9.32 mi11:36:201:08:367:2223:08
7:27
+0:02
20K
12.43 mi11:59:261:31:427:2323:06
7:26
-0:01
Half
13.11 mi12:04:191:36:357:224:53
7:09
-0:17
25K
15.53 mi12:21:511:54:077:2117:32
7:14
+0:05
30K
18.64 mi12:45:102:17:267:2223:19
7:30
+0:16
20M
20.00 mi12:55:172:27:337:2310:07
7:27
-0:03
21M
21.00 mi13:03:072:35:237:247:50
7:50
+0:23
35K
21.75 mi13:08:292:40:457:235:22
7:10
-0:40
23M
23.00 mi13:17:352:49:517:239:06
7:16
+0:06
24M
24.00 mi13:24:302:56:467:226:55
6:55
-0:21
40K
24.85 mi13:30:363:02:527:216:06
7:08
+0:13
25.2M
25.20 mi13:33:143:05:307:222:38
7:38
+0:30
Finish
26.22 mi13:40:023:12:187:206:48
6:40
-0:58

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

6:40 /mi

Average Pace

7:20 /mi

Slowest Pace

7:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:19:09

41% of race

Time at Steady Pace

1:53:09

59% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:20 /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 mi10:50:1122:277:1422:27
7:14
#9669
10K
6.21 mi11:13:1245:287:1923:01
7:25
#10465
15K
9.32 mi11:36:201:08:367:2223:08
7:27
#10711
20K
12.43 mi11:59:261:31:427:2323:06
7:26
#10571
Half
13.11 mi12:04:191:36:357:224:53
7:09
#10460
25K
15.53 mi12:21:511:54:077:2117:32
7:14
#9960
30K
18.64 mi12:45:102:17:267:2223:19
7:30
#9461
20M
20.00 mi12:55:172:27:337:2310:07
7:27
#9203
21M
21.00 mi13:03:072:35:237:247:50
7:50
#8986
35K
21.75 mi13:08:292:40:457:235:22
7:10
#8828
23M
23.00 mi13:17:352:49:517:239:06
7:16
#8485
24M
24.00 mi13:24:302:56:467:226:55
6:55
#8219
40K
24.85 mi13:30:363:02:527:216:06
7:08
#8041
25.2M
25.20 mi13:33:143:05:307:222:38
7:38
#7933
Finish
26.22 mi13:40:023:12:187:206:48
6:40
#7686
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi96697986798611276(Top 40%)8722(Top 54%)8722(Top 437%)
10K6.21 mi3.10 mi10465-7968399-4138399-41311235(Top 40%)8763(Top 54%)8763(Top 439%)
15K9.32 mi3.11 mi10711-2468494-958494-9511276(Top 40%)8722(Top 54%)8722(Top 437%)
20K12.43 mi3.11 mi10571+1408406+888406+8810188(Top 36%)8104(Top 50%)8104(Top 406%)
Half13.11 mi0.68 mi10460+1118347+598347+598666(Top 31%)7278(Top 45%)7278(Top 365%)
25K15.53 mi2.42 mi9960+5008049+2988049+2987814(Top 28%)6643(Top 41%)6643(Top 333%)
30K18.64 mi3.11 mi9461+4997726+3237726+3237769(Top 27%)6450(Top 40%)6450(Top 323%)
20M20.00 mi1.36 mi9203+2587553+1737553+1736661(Top 23%)5621(Top 35%)5621(Top 282%)
21M21.00 mi1.00 mi8986+2177394+1597394+1596384(Top 22%)5320(Top 33%)5320(Top 267%)
35K21.75 mi0.75 mi8828+1587282+1127282+1126441(Top 23%)5355(Top 33%)5355(Top 268%)
23M23.00 mi1.25 mi8485+3437035+2477035+2475278(Top 19%)4514(Top 28%)4514(Top 226%)
24M24.00 mi1.00 mi8219+2666840+1956840+1954196(Top 15%)3697(Top 23%)3697(Top 185%)
40K24.85 mi0.85 mi8041+1786694+1466694+1464689(Top 17%)3994(Top 25%)3994(Top 200%)
25.2M25.20 mi0.35 mi7933+1086617+776617+774083(Top 14%)3499(Top 22%)3499(Top 175%)
Finish26.22 mi1.02 mi7686+2476431+1866431+1863748(Top 13%)3253(Top 20%)3253(Top 163%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21stories
+97ft-345ft

Overall

11276

Males

8722

M50-54

8722

5K→10K

3.1 - 6.2 mi

Top 40%
×5stories
+79ft-138ft

Overall

11235

Males

8763

M50-54

8763

10K→15K

6.2 - 9.3 mi

Top 40%
×3stories
+67ft-78ft

Overall

11276

Males

8722

M50-54

8722

15K→20K

9.3 - 12.4 mi

Top 36%
×5stories
+106ft-86ft

Overall

10188

Males

8104

M50-54

8104

20K→Half

12.4 - 13.1 mi

Top 31%
×2stories
+19ft-37ft

Overall

8666

Males

7278

M50-54

7278

Half→25K

13.1 - 15.5 mi

Top 28%
×4stories
+66ft-88ft

Overall

7814

Males

6643

M50-54

6643

25K→30K

15.5 - 18.6 mi

Top 27%
×9stories
+181ft-148ft

Overall

7769

Males

6450

M50-54

6450

30K→20M

18.6 - 20.0 mi

Top 23%
×5stories
+64ft-50ft

Overall

6661

Males

5621

M50-54

5621

20M→21M

20.0 - 21.0 mi

Top 22%
×8stories
+106ft-24ft

Overall

6384

Males

5320

M50-54

5320

21M→35K

21.0 - 21.8 mi

Top 23%
×7stories
+17ft-86ft

Overall

6441

Males

5355

M50-54

5355

35K→23M

21.8 - 23.0 mi

Top 19%
×5stories
+23ft-63ft

Overall

5278

Males

4514

M50-54

4514

23M→24M

23.0 - 24.0 mi

Top 15%
×6stories
+12ft-82ft

Overall

4196

Males

3697

M50-54

3697

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4689

Males

3994

M50-54

3994

40K→25.2M

24.9 - 25.2 mi

Top 14%
×1story
+13ft-16ft

Overall

4083

Males

3499

M50-54

3499

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3748

Males

3253

M50-54

3253

Passing Analysis

Category:
Athletes Passed
3329*
Passed By
1344
Net Change
+1983
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9669
5K → 10K41835-796#9669#10465
10K → 15K103349-246#10465#10711
15K → 20K23292+140#10711#10571
20K → Half1143+111#10571#10460
Half → 25K503*3+500#10460#9960
25K → 30K52829+499#9960#9461
30K → 20M2657+258#9461#9203
20M → 21M23013+217#9203#8986
21M → 35K1624+158#8986#8828
35K → 23M3474+343#8828#8485
23M → 24M2671+266#8485#8219
24M → 40K1813+178#8219#8041
40K → 25.2M1080+108#8041#7933
25.2M → Finish2481+247#7933#7686
TOTALS3329*1344+1983

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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