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BOSTON MARATHON 2025

Aaron Mason

Bib: 4811•M

PA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 31%
Gender (Male)
#0 / 16105
Top 44%
Division (M18-39)
#0 / 5642
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:50
Rank: #5504
Start → 5K
20:50 | 6:42/mi
10K· 6.21 mi
41:42
Rank: #5479 (+25)
5K → 10K
20:52 | 6:43/mi
15K· 9.32 mi
1:03:11
Rank: #5996 (-517)
10K → 15K
21:29 | 6:55/mi
20K· 12.43 mi
1:24:47
Rank: #6136 (-140)
15K → 20K
21:36 | 6:57/mi
Half· 13.11 mi
1:29:32
Rank: #6223 (-87)
20K → Half
4:45 | 6:58/mi
25K· 15.53 mi
1:46:04
Rank: #5961 (+262)
Half → 25K
16:32 | 6:49/mi
30K· 18.64 mi
2:09:45
Rank: #6403 (-442)
25K → 30K
23:41 | 7:37/mi
20M
2:20:42
Rank: #6606 (-203)
30K → 20M
10:57 | 8:03/mi
21M
2:29:55
Rank: #6984 (-378)
20M → 21M
9:13 | 9:13/mi
35K· 21.75 mi
2:36:33
Rank: #7306 (-322)
21M → 35K
6:38 | 8:52/mi
23M
2:47:31
Rank: #7699 (-393)
35K → 23M
10:58 | 8:46/mi
24M
2:56:30
Rank: #8144 (-445)
23M → 24M
8:59 | 8:59/mi
40K· 24.85 mi
3:04:18
Rank: #8495 (-351)
24M → 40K
7:48 | 9:07/mi
25.2M
3:07:32
Rank: #8593 (-98)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:15:59
Rank: #8856 (-263)
25.2M → Finish
8:27 | 8:18/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:29:32
Pace6:50 /mi
2nd Half
Distance13.11 mi
Time1:46:27
Pace8:07 /mi
📊Positive Split: 18.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:1220:506:4220:50
6:42
-
10K
6.21 mi10:46:0441:426:4320:52
6:43
+0:01
15K
9.32 mi11:07:331:03:116:4721:29
6:55
+0:12
20K
12.43 mi11:29:091:24:476:4921:36
6:57
+0:02
Half
13.11 mi11:33:541:29:326:504:45
6:58
+0:01
25K
15.53 mi11:50:261:46:046:5016:32
6:49
-0:09
30K
18.64 mi12:14:072:09:456:5823:41
7:37
+0:48
20M
20.00 mi12:25:042:20:427:0210:57
8:03
+0:26
21M
21.00 mi12:34:172:29:557:089:13
9:13
+1:10
35K
21.75 mi12:40:552:36:337:126:38
8:52
-0:21
23M
23.00 mi12:51:532:47:317:1710:58
8:46
-0:06
24M
24.00 mi13:00:522:56:307:218:59
8:59
+0:13
40K
24.85 mi13:08:403:04:187:257:48
9:07
+0:08
25.2M
25.20 mi13:11:543:07:327:273:14
9:23
+0:16
Finish
26.22 mi13:20:213:15:597:298:27
8:18
-1:05

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

6:42 /mi

Average Pace

7:29 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:04

54% of race

Time at Steady Pace

43:05

22% of race

Time at Slower Pace

46:50

24% of race

Average Pace: 7:28 /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 mi10:25:1220:506:4220:50
6:42
#5504
10K
6.21 mi10:46:0441:426:4320:52
6:43
#5479
15K
9.32 mi11:07:331:03:116:4721:29
6:55
#5996
20K
12.43 mi11:29:091:24:476:4921:36
6:57
#6136
Half
13.11 mi11:33:541:29:326:504:45
6:58
#6223
25K
15.53 mi11:50:261:46:046:5016:32
6:49
#5961
30K
18.64 mi12:14:072:09:456:5823:41
7:37
#6403
20M
20.00 mi12:25:042:20:427:0210:57
8:03
#6606
21M
21.00 mi12:34:172:29:557:089:13
9:13
#6984
35K
21.75 mi12:40:552:36:337:126:38
8:52
#7306
23M
23.00 mi12:51:532:47:317:1710:58
8:46
#7699
24M
24.00 mi13:00:522:56:307:218:59
8:59
#8144
40K
24.85 mi13:08:403:04:187:257:48
9:07
#8495
25.2M
25.20 mi13:11:543:07:327:273:14
9:23
#8593
Finish
26.22 mi13:20:213:15:597:298:27
8:18
#8856
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi5504510651067060(Top 25%)6295(Top 39%)6295(Top 112%)
10K6.21 mi3.10 mi5479+255066+405066+405496(Top 19%)5071(Top 31%)5071(Top 90%)
15K9.32 mi3.11 mi5996-5175496-4305496-4307060(Top 25%)6295(Top 39%)6295(Top 112%)
20K12.43 mi3.11 mi6136-1405596-1005596-1006605(Top 23%)5911(Top 37%)5911(Top 105%)
Half13.11 mi0.68 mi6223-875660-645660-647303(Top 26%)6445(Top 40%)6445(Top 114%)
25K15.53 mi2.42 mi5961+2625425+2355425+2355033(Top 18%)4620(Top 29%)4620(Top 82%)
30K18.64 mi3.11 mi6403-4425756-3315756-3318621(Top 30%)6946(Top 43%)6946(Top 123%)
20M20.00 mi1.36 mi6606-2035889-1335889-13310801(Top 38%)7935(Top 49%)7935(Top 141%)
21M21.00 mi1.00 mi6984-3786142-2536142-25314682(Top 52%)9646(Top 60%)9646(Top 171%)
35K21.75 mi0.75 mi7306-3226336-1946336-19417554(Top 62%)10832(Top 67%)10832(Top 192%)
23M23.00 mi1.25 mi7699-3936543-2076543-20714848(Top 52%)9551(Top 59%)9551(Top 169%)
24M24.00 mi1.00 mi8144-4456796-2536796-25317243(Top 61%)10573(Top 66%)10573(Top 187%)
40K24.85 mi0.85 mi8495-3516974-1786974-17816927(Top 60%)10334(Top 64%)10334(Top 183%)
25.2M25.20 mi0.35 mi8593-987014-407014-4013785(Top 49%)8819(Top 55%)8819(Top 156%)
Finish26.22 mi1.02 mi8856-2637124-1107124-11014828(Top 52%)9398(Top 58%)9398(Top 167%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 25%
×21stories
+97ft-345ft

Overall

7060

Males

6295

M18-39

6295

5K→10K

3.1 - 6.2 mi

Top 19%
×5stories
+79ft-138ft

Overall

5496

Males

5071

M18-39

5071

10K→15K

6.2 - 9.3 mi

Top 25%
×3stories
+67ft-78ft

Overall

7060

Males

6295

M18-39

6295

15K→20K

9.3 - 12.4 mi

Top 23%
×5stories
+106ft-86ft

Overall

6605

Males

5911

M18-39

5911

20K→Half

12.4 - 13.1 mi

Top 26%
×2stories
+19ft-37ft

Overall

7303

Males

6445

M18-39

6445

Half→25K

13.1 - 15.5 mi

Top 18%
×4stories
+66ft-88ft

Overall

5033

Males

4620

M18-39

4620

25K→30K

15.5 - 18.6 mi

Top 30%
×9stories
+181ft-148ft

Overall

8621

Males

6946

M18-39

6946

30K→20M

18.6 - 20.0 mi

Top 38%
×5stories
+64ft-50ft

Overall

10801

Males

7935

M18-39

7935

20M→21M

20.0 - 21.0 mi

Top 52%
×8stories
+106ft-24ft

Overall

14682

Males

9646

M18-39

9646

21M→35K

21.0 - 21.8 mi

Top 62%
×7stories
+17ft-86ft

Overall

17554

Males

10832

M18-39

10832

35K→23M

21.8 - 23.0 mi

Top 52%
×5stories
+23ft-63ft

Overall

14848

Males

9551

M18-39

9551

23M→24M

23.0 - 24.0 mi

Top 61%
×6stories
+12ft-82ft

Overall

17243

Males

10573

M18-39

10573

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

16927

Males

10334

M18-39

10334

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13785

Males

8819

M18-39

8819

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2stories
+22ft-21ft

Overall

14828

Males

9398

M18-39

9398

Passing Analysis

Category:
Athletes Passed
864
Passed By
4216
Net Change
-3352
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#5504
5K → 10K200175+25#5504#5479
10K → 15K36553-517#5479#5996
15K → 20K109249-140#5996#6136
20K → Half996-87#6136#6223
Half → 25K27210+262#6223#5961
25K → 30K74516-442#5961#6403
30K → 20M48251-203#6403#6606
20M → 21M12390-378#6606#6984
21M → 35K7329-322#6984#7306
35K → 23M29422-393#7306#7699
23M → 24M11456-445#7699#8144
24M → 40K18369-351#8144#8495
40K → 25.2M18116-98#8495#8593
25.2M → Finish21284-263#8593#8856
TOTALS8644216-3352
📊

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