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BOSTON MARATHON 2025

Thomas Bellsky

Bib: 9201•M

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 17%
Gender (Male)
#0 / 16105
Top 27%
Masters (Masters Men)
#0 / 10463
Top 13%
Division (M40-44)
#0 / 2247
Top 33%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:52
Rank: #5571
Start → 5K
20:52 | 6:43/mi
10K· 6.21 mi
41:41
Rank: #5446 (+125)
5K → 10K
20:49 | 6:42/mi
15K· 9.32 mi
1:02:40
Rank: #5484 (-38)
10K → 15K
20:59 | 6:45/mi
20K· 12.43 mi
1:24:07
Rank: #5656 (-172)
15K → 20K
21:27 | 6:54/mi
Half· 13.11 mi
1:28:42
Rank: #5636 (+20)
20K → Half
4:35 | 6:43/mi
25K· 15.53 mi
1:45:16
Rank: #5504 (+132)
Half → 25K
16:34 | 6:50/mi
30K· 18.64 mi
2:07:05
Rank: #5308 (+196)
25K → 30K
21:49 | 7:01/mi
20M
2:16:41
Rank: #5210 (+98)
30K → 20M
9:36 | 7:04/mi
21M
2:24:04
Rank: #5097 (+113)
20M → 21M
7:23 | 7:23/mi
35K· 21.75 mi
2:29:09
Rank: #5050 (+47)
21M → 35K
5:05 | 6:48/mi
23M
2:37:56
Rank: #4937 (+113)
35K → 23M
8:47 | 7:01/mi
24M
2:44:49
Rank: #4865 (+72)
23M → 24M
6:53 | 6:53/mi
40K· 24.85 mi
2:50:55
Rank: #4840 (+25)
24M → 40K
6:06 | 7:08/mi
25.2M
2:53:32
Rank: #4807 (+33)
40K → 25.2M
2:37 | 7:35/mi
Finish· 26.22 mi
3:00:13
Rank: #4730 (+77)
25.2M → Finish
6:41 | 6:34/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:28:42
Pace6:46 /mi
2nd Half
Distance13.11 mi
Time1:31:31
Pace6:59 /mi
📊Positive Split: 3.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:2120:526:4320:52
6:43
-
10K
6.21 mi11:07:1041:416:4220:49
6:42
-0:01
15K
9.32 mi11:28:091:02:406:4320:59
6:45
+0:03
20K
12.43 mi11:49:361:24:076:4621:27
6:54
+0:09
Half
13.11 mi11:54:111:28:426:464:35
6:43
-0:11
25K
15.53 mi12:10:451:45:166:4716:34
6:50
+0:07
30K
18.64 mi12:32:342:07:056:4921:49
7:01
+0:11
20M
20.00 mi12:42:102:16:416:509:36
7:04
+0:03
21M
21.00 mi12:49:332:24:046:527:23
7:23
+0:19
35K
21.75 mi12:54:382:29:096:515:05
6:48
-0:35
23M
23.00 mi13:03:252:37:566:528:47
7:01
+0:13
24M
24.00 mi13:10:182:44:496:526:53
6:53
-0:08
40K
24.85 mi13:16:242:50:556:536:06
7:08
+0:15
25.2M
25.20 mi13:19:012:53:326:532:37
7:35
+0:27
Finish
26.22 mi13:25:423:00:136:536:41
6:34
-1:01

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

6:34 /mi

Average Pace

6:53 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:50:13

94% of race

Time at Steady Pace

10:00

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:52 /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 mi10:46:2120:526:4320:52
6:43
#5571
10K
6.21 mi11:07:1041:416:4220:49
6:42
#5446
15K
9.32 mi11:28:091:02:406:4320:59
6:45
#5484
20K
12.43 mi11:49:361:24:076:4621:27
6:54
#5656
Half
13.11 mi11:54:111:28:426:464:35
6:43
#5636
25K
15.53 mi12:10:451:45:166:4716:34
6:50
#5504
30K
18.64 mi12:32:342:07:056:4921:49
7:01
#5308
20M
20.00 mi12:42:102:16:416:509:36
7:04
#5210
21M
21.00 mi12:49:332:24:046:527:23
7:23
#5097
35K
21.75 mi12:54:382:29:096:515:05
6:48
#5050
23M
23.00 mi13:03:252:37:566:528:47
7:01
#4937
24M
24.00 mi13:10:182:44:496:526:53
6:53
#4865
40K
24.85 mi13:16:242:50:556:536:06
7:08
#4840
25.2M
25.20 mi13:19:012:53:326:532:37
7:35
#4807
Finish
26.22 mi13:25:423:00:136:536:41
6:34
#4730
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi5571515651565613(Top 20%)5130(Top 32%)5130(Top 228%)
10K6.21 mi3.10 mi5446+1255040+1165040+1165332(Top 19%)4933(Top 31%)4933(Top 220%)
15K9.32 mi3.11 mi5484-385069-295069-295613(Top 20%)5130(Top 32%)5130(Top 228%)
20K12.43 mi3.11 mi5656-1725195-1265195-1266207(Top 22%)5591(Top 35%)5591(Top 249%)
Half13.11 mi0.68 mi5636+205177+185177+185364(Top 19%)4919(Top 31%)4919(Top 219%)
25K15.53 mi2.42 mi5504+1325059+1185059+1185101(Top 18%)4676(Top 29%)4676(Top 208%)
30K18.64 mi3.11 mi5308+1964876+1834876+1834813(Top 17%)4385(Top 27%)4385(Top 195%)
20M20.00 mi1.36 mi5210+984777+994777+994463(Top 16%)4061(Top 25%)4061(Top 181%)
21M21.00 mi1.00 mi5097+1134680+974680+974013(Top 14%)3636(Top 23%)3636(Top 162%)
35K21.75 mi0.75 mi5050+474636+444636+444062(Top 14%)3637(Top 23%)3637(Top 162%)
23M23.00 mi1.25 mi4937+1134529+1074529+1073829(Top 13%)3442(Top 21%)3442(Top 153%)
24M24.00 mi1.00 mi4865+724456+734456+733970(Top 14%)3509(Top 22%)3509(Top 156%)
40K24.85 mi0.85 mi4840+254435+214435+214641(Top 16%)3946(Top 25%)3946(Top 176%)
25.2M25.20 mi0.35 mi4807+334400+354400+353784(Top 13%)3266(Top 20%)3266(Top 145%)
Finish26.22 mi1.02 mi4730+774329+714329+713083(Top 11%)2738(Top 17%)2738(Top 122%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 20%
×21stories
+97ft-345ft

Overall

5613

Males

5130

M40-44

5130

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5332

Males

4933

M40-44

4933

10K→15K

6.2 - 9.3 mi

Top 20%
×3stories
+67ft-78ft

Overall

5613

Males

5130

M40-44

5130

15K→20K

9.3 - 12.4 mi

Top 22%
×5stories
+106ft-86ft

Overall

6207

Males

5591

M40-44

5591

20K→Half

12.4 - 13.1 mi

Top 19%
×2stories
+19ft-37ft

Overall

5364

Males

4919

M40-44

4919

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

5101

Males

4676

M40-44

4676

25K→30K

15.5 - 18.6 mi

Top 17%
×9stories
+181ft-148ft

Overall

4813

Males

4385

M40-44

4385

30K→20M

18.6 - 20.0 mi

Top 16%
×5stories
+64ft-50ft

Overall

4463

Males

4061

M40-44

4061

20M→21M

20.0 - 21.0 mi

Top 14%
×8stories
+106ft-24ft

Overall

4013

Males

3636

M40-44

3636

21M→35K

21.0 - 21.8 mi

Top 14%
×7stories
+17ft-86ft

Overall

4062

Males

3637

M40-44

3637

35K→23M

21.8 - 23.0 mi

Top 13%
×5stories
+23ft-63ft

Overall

3829

Males

3442

M40-44

3442

23M→24M

23.0 - 24.0 mi

Top 14%
×6stories
+12ft-82ft

Overall

3970

Males

3509

M40-44

3509

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4641

Males

3946

M40-44

3946

40K→25.2M

24.9 - 25.2 mi

Top 13%
×1story
+13ft-16ft

Overall

3784

Males

3266

M40-44

3266

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

3083

Males

2738

M40-44

2738

Passing Analysis

Category:
Athletes Passed
1670
Passed By
829
Net Change
+841
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5571
5K → 10K257132+125#5571#5446
10K → 15K102140-38#5446#5484
15K → 20K77249-172#5484#5656
20K → Half3111+20#5656#5636
Half → 25K18250+132#5636#5504
25K → 30K25862+196#5504#5308
30K → 20M12123+98#5308#5210
20M → 21M14128+113#5210#5097
21M → 35K7023+47#5097#5050
35K → 23M13724+113#5050#4937
23M → 24M10028+72#4937#4865
24M → 40K6742+25#4865#4840
40K → 25.2M4411+33#4840#4807
25.2M → Finish836+77#4807#4730
TOTALS1670829+841
📊

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