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BOSTON MARATHON 2025

Aaron Bronson

Bib: 3305•M

CO

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 8%
Gender (Male)
#0 / 16105
Top 13%
Division (M18-39)
#0 / 5642
Top 31%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
19:35
Rank: #2449
Start → 5K
19:35 | 6:18/mi
10K· 6.21 mi
38:57
Rank: #2229 (+220)
5K → 10K
19:22 | 6:14/mi
15K· 9.32 mi
58:12
Rank: #2071 (+158)
10K → 15K
19:15 | 6:12/mi
20K· 12.43 mi
1:17:32
Rank: #1942 (+129)
15K → 20K
19:20 | 6:13/mi
Half· 13.11 mi
1:21:45
Rank: #1927 (+15)
20K → Half
4:13 | 6:11/mi
25K· 15.53 mi
1:36:55
Rank: #1882 (+45)
Half → 25K
15:10 | 6:15/mi
30K· 18.64 mi
1:57:14
Rank: #1894 (-12)
25K → 30K
20:19 | 6:32/mi
20M
2:06:20
Rank: #1916 (-22)
30K → 20M
9:06 | 6:42/mi
21M
2:13:39
Rank: #1977 (-61)
20M → 21M
7:19 | 7:19/mi
35K· 21.75 mi
2:18:35
Rank: #1992 (-15)
21M → 35K
4:56 | 6:36/mi
23M
2:27:08
Rank: #2012 (-20)
35K → 23M
8:33 | 6:50/mi
24M
2:33:58
Rank: #2036 (-24)
23M → 24M
6:50 | 6:50/mi
40K· 24.85 mi
2:39:59
Rank: #2074 (-38)
24M → 40K
6:01 | 7:02/mi
25.2M
2:42:45
Rank: #2124 (-50)
40K → 25.2M
2:46 | 8:01/mi
Finish· 26.22 mi
2:49:45
Rank: #2222 (-98)
25.2M → Finish
7:00 | 6:52/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:21:45
Pace6:14 /mi
2nd Half
Distance13.11 mi
Time1:28:00
Pace6:43 /mi
📊Positive Split: 7.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:1919:356:1819:35
6:18
-
10K
6.21 mi10:41:4138:576:1619:22
6:14
-0:04
15K
9.32 mi11:00:5658:126:1519:15
6:12
-0:02
20K
12.43 mi11:20:161:17:326:1419:20
6:13
+0:01
Half
13.11 mi11:24:291:21:456:144:13
6:11
-0:02
25K
15.53 mi11:39:391:36:556:1415:10
6:15
+0:04
30K
18.64 mi11:59:581:57:146:1720:19
6:32
+0:17
20M
20.00 mi12:09:042:06:206:199:06
6:42
+0:10
21M
21.00 mi12:16:232:13:396:227:19
7:19
+0:37
35K
21.75 mi12:21:192:18:356:224:56
6:36
-0:43
23M
23.00 mi12:29:522:27:086:248:33
6:50
+0:14
24M
24.00 mi12:36:422:33:586:256:50
6:50
0:00
40K
24.85 mi12:42:432:39:596:266:01
7:02
+0:12
25.2M
25.20 mi12:45:292:42:456:282:46
8:01
+0:59
Finish
26.22 mi12:52:292:49:456:297:00
6:52
-1:09

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

6:11 /mi

Average Pace

6:29 /mi

Slowest Pace

8:01 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:36:55

57% of race

Time at Steady Pace

49:44

29% of race

Time at Slower Pace

23:06

14% of race

Average Pace: 6:28 /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 mi10:22:1919:356:1819:35
6:18
#2449
10K
6.21 mi10:41:4138:576:1619:22
6:14
#2229
15K
9.32 mi11:00:5658:126:1519:15
6:12
#2071
20K
12.43 mi11:20:161:17:326:1419:20
6:13
#1942
Half
13.11 mi11:24:291:21:456:144:13
6:11
#1927
25K
15.53 mi11:39:391:36:556:1415:10
6:15
#1882
30K
18.64 mi11:59:581:57:146:1720:19
6:32
#1894
20M
20.00 mi12:09:042:06:206:199:06
6:42
#1916
21M
21.00 mi12:16:232:13:396:227:19
7:19
#1977
35K
21.75 mi12:21:192:18:356:224:56
6:36
#1992
23M
23.00 mi12:29:522:27:086:248:33
6:50
#2012
24M
24.00 mi12:36:422:33:586:256:50
6:50
#2036
40K
24.85 mi12:42:432:39:596:266:01
7:02
#2074
25.2M
25.20 mi12:45:292:42:456:282:46
8:01
#2124
Finish
26.22 mi12:52:292:49:456:297:00
6:52
#2222
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2449233223321843(Top 6%)1754(Top 11%)1754(Top 31%)
10K6.21 mi3.10 mi2229+2202127+2052127+2052063(Top 7%)1966(Top 12%)1966(Top 35%)
15K9.32 mi3.11 mi2071+1581975+1521975+1521843(Top 6%)1754(Top 11%)1754(Top 31%)
20K12.43 mi3.11 mi1942+1291852+1231852+1231668(Top 6%)1586(Top 10%)1586(Top 28%)
Half13.11 mi0.68 mi1927+151838+141838+141878(Top 7%)1791(Top 11%)1791(Top 32%)
25K15.53 mi2.42 mi1882+451793+451793+451671(Top 6%)1588(Top 10%)1588(Top 28%)
30K18.64 mi3.11 mi1894-121804-111804-112147(Top 8%)2037(Top 13%)2037(Top 36%)
20M20.00 mi1.36 mi1916-221823-191823-192428(Top 9%)2289(Top 14%)2289(Top 41%)
21M21.00 mi1.00 mi1977-611881-581881-583663(Top 13%)3345(Top 21%)3345(Top 59%)
35K21.75 mi0.75 mi1992-151893-121893-122885(Top 10%)2657(Top 16%)2657(Top 47%)
23M23.00 mi1.25 mi2012-201912-191912-192831(Top 10%)2593(Top 16%)2593(Top 46%)
24M24.00 mi1.00 mi2036-241933-211933-213663(Top 13%)3259(Top 20%)3259(Top 58%)
40K24.85 mi0.85 mi2074-381968-351968-354084(Top 14%)3542(Top 22%)3542(Top 63%)
25.2M25.20 mi0.35 mi2124-502017-492017-495945(Top 21%)4671(Top 29%)4671(Top 83%)
Finish26.22 mi1.02 mi2222-982107-902107-904867(Top 17%)4015(Top 25%)4015(Top 71%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21stories
+97ft-345ft

Overall

1843

Males

1754

M18-39

1754

5K→10K

3.1 - 6.2 mi

Top 7%
×5stories
+79ft-138ft

Overall

2063

Males

1966

M18-39

1966

10K→15K

6.2 - 9.3 mi

Top 6%
×3stories
+67ft-78ft

Overall

1843

Males

1754

M18-39

1754

15K→20K

9.3 - 12.4 mi

Top 6%
×5stories
+106ft-86ft

Overall

1668

Males

1586

M18-39

1586

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1878

Males

1791

M18-39

1791

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1671

Males

1588

M18-39

1588

25K→30K

15.5 - 18.6 mi

Top 8%
×9stories
+181ft-148ft

Overall

2147

Males

2037

M18-39

2037

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2428

Males

2289

M18-39

2289

20M→21M

20.0 - 21.0 mi

Top 13%
×8stories
+106ft-24ft

Overall

3663

Males

3345

M18-39

3345

21M→35K

21.0 - 21.8 mi

Top 10%
×7stories
+17ft-86ft

Overall

2885

Males

2657

M18-39

2657

35K→23M

21.8 - 23.0 mi

Top 10%
×5stories
+23ft-63ft

Overall

2831

Males

2593

M18-39

2593

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3663

Males

3259

M18-39

3259

24M→40K

24.0 - 24.9 mi

Top 14%
×1story
+6ft-20ft

Overall

4084

Males

3542

M18-39

3542

40K→25.2M

24.9 - 25.2 mi

Top 21%
×1story
+13ft-16ft

Overall

5945

Males

4671

M18-39

4671

25.2M→Finish

25.2 - 26.2 mi

Top 17%
×2stories
+22ft-21ft

Overall

4867

Males

4015

M18-39

4015

Passing Analysis

Category:
Athletes Passed
916
Passed By
689
Net Change
+227
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2449
5K → 10K24828+220#2449#2229
10K → 15K17315+158#2229#2071
15K → 20K14213+129#2071#1942
20K → Half216+15#1942#1927
Half → 25K6318+45#1927#1882
25K → 30K8395-12#1882#1894
30K → 20M2951-22#1894#1916
20M → 21M2283-61#1916#1977
21M → 35K2439-15#1977#1992
35K → 23M4262-20#1992#2012
23M → 24M2852-24#2012#2036
24M → 40K2866-38#2036#2074
40K → 25.2M353-50#2074#2124
25.2M → Finish10108-98#2124#2222
TOTALS916689+227
📊

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