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BOSTON MARATHON 2025

Michael O'Brien

Bib: 27351•M

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
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
33:16
Rank: #27129
Start → 5K
10:42/mi
33:16 split
10K· 6.21 mi
1:07:02
Rank: #27003 (+126)
5K → 10K
10:52/mi
33:46 split
15K· 9.32 mi
1:40:13
Rank: #26709 (+294)
10K → 15K
10:41/mi
33:11 split
20K· 12.43 mi
2:12:05
Rank: #26211 (+498)
15K → 20K
10:15/mi
31:52 split
Half· 13.11 mi
2:18:26
Rank: #26069 (+142)
20K → Half
9:18/mi
6:21 split
25K· 15.53 mi
2:43:42
Rank: #25752 (+317)
Half → 25K
10:25/mi
25:16 split
30K· 18.64 mi
3:18:48
Rank: #25538 (+214)
25K → 30K
11:18/mi
35:06 split
20M
3:34:02
Rank: #25436 (+102)
30K → 20M
11:13/mi
15:14 split
21M
3:45:44
Rank: #25308 (+128)
20M → 21M
11:42/mi
11:42 split
35K· 21.75 mi
3:53:23
Rank: #25232 (+76)
21M → 35K
10:14/mi
7:39 split
23M
4:07:08
Rank: #25140 (+92)
35K → 23M
10:59/mi
13:45 split
24M
4:18:25
Rank: #25113 (+27)
23M → 24M
11:17/mi
11:17 split
40K· 24.85 mi
4:28:46
Rank: #25128 (-15)
24M → 40K
12:06/mi
10:21 split
25.2M
4:33:10
Rank: #25125 (+3)
40K → 25.2M
12:46/mi
4:24 split
Finish· 26.22 mi
4:44:03
Rank: #25120 (+5)
25.2M → Finish
10:41/mi
10:53 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:18:26
Pace10:34 /mi
2nd Half
Distance13.11 mi
Time2:25:37
Pace11:06 /mi
📊Positive Split: 5.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:58:5433:1610:4233:16
10:42
-
10K
6.21 mi12:32:401:07:0210:4733:46
10:52
+0:10
15K
9.32 mi13:05:511:40:1310:4533:11
10:41
-0:11
20K
12.43 mi13:37:432:12:0510:3831:52
10:15
-0:26
Half
13.11 mi13:44:042:18:2610:346:21
9:18
-0:57
25K
15.53 mi14:09:202:43:4210:3225:16
10:25
+1:07
30K
18.64 mi14:44:263:18:4810:4035:06
11:18
+0:53
20M
20.00 mi14:59:403:34:0210:4215:14
11:13
-0:05
21M
21.00 mi15:11:223:45:4410:4511:42
11:42
+0:29
35K
21.75 mi15:19:013:53:2310:447:39
10:14
-1:28
23M
23.00 mi15:32:464:07:0810:4513:45
10:59
+0:45
24M
24.00 mi15:44:034:18:2510:4611:17
11:17
+0:18
40K
24.85 mi15:54:244:28:4610:4910:21
12:06
+0:49
25.2M
25.20 mi15:58:484:33:1010:504:24
12:46
+0:40
Finish
26.22 mi16:09:414:44:0310:5010:53
10:41
-2:05

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

9:18 /mi

Average Pace

10:50 /mi

Slowest Pace

12:46 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:11:08

25% of race

Time at Steady Pace

2:20:05

49% of race

Time at Slower Pace

1:12:50

26% of race

Average Pace: 10:50 /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 mi11:58:5433:1610:4233:16
10:42
#27129
10K
6.21 mi12:32:401:07:0210:4733:46
10:52
#27003
15K
9.32 mi13:05:511:40:1310:4533:11
10:41
#26709
20K
12.43 mi13:37:432:12:0510:3831:52
10:15
#26211
Half
13.11 mi13:44:042:18:2610:346:21
9:18
#26069
25K
15.53 mi14:09:202:43:4210:3225:16
10:25
#25752
30K
18.64 mi14:44:263:18:4810:4035:06
11:18
#25538
20M
20.00 mi14:59:403:34:0210:4215:14
11:13
#25436
21M
21.00 mi15:11:223:45:4410:4511:42
11:42
#25308
35K
21.75 mi15:19:013:53:2310:447:39
10:14
#25232
23M
23.00 mi15:32:464:07:0810:4513:45
10:59
#25140
24M
24.00 mi15:44:034:18:2510:4611:17
11:17
#25113
40K
24.85 mi15:54:244:28:4610:4910:21
12:06
#25128
25.2M
25.20 mi15:58:484:33:1010:504:24
12:46
#25125
Finish
26.22 mi16:09:414:44:0310:5010:53
10:41
#25120
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi27129156541565426223(Top 92%)15257(Top 95%)15257(Top 270%)
10K6.21 mi3.10 mi27003+12615589+6515589+6526877(Top 95%)15516(Top 96%)15516(Top 275%)
15K9.32 mi3.11 mi26709+29415467+12215467+12226223(Top 92%)15257(Top 95%)15257(Top 270%)
20K12.43 mi3.11 mi26211+49815252+21515252+21524752(Top 87%)14560(Top 90%)14560(Top 258%)
Half13.11 mi0.68 mi26069+14215176+7615176+7622986(Top 81%)13794(Top 86%)13794(Top 244%)
25K15.53 mi2.42 mi25752+31715024+15215024+15224222(Top 85%)14296(Top 89%)14296(Top 253%)
30K18.64 mi3.11 mi25538+21414887+13714887+13724547(Top 86%)14330(Top 89%)14330(Top 254%)
20M20.00 mi1.36 mi25436+10214836+5114836+5124023(Top 85%)13999(Top 87%)13999(Top 248%)
21M21.00 mi1.00 mi25308+12814768+6814768+6823022(Top 81%)13457(Top 84%)13457(Top 239%)
35K21.75 mi0.75 mi25232+7614722+4614722+4622503(Top 79%)13162(Top 82%)13162(Top 233%)
23M23.00 mi1.25 mi25140+9214668+5414668+5423183(Top 82%)13423(Top 83%)13423(Top 238%)
24M24.00 mi1.00 mi25113+2714649+1914649+1924529(Top 86%)14071(Top 87%)14071(Top 249%)
40K24.85 mi0.85 mi25128-1514647+214647+225084(Top 88%)14309(Top 89%)14309(Top 254%)
25.2M25.20 mi0.35 mi25125+314642+514642+524674(Top 87%)14109(Top 88%)14109(Top 250%)
Finish26.22 mi1.02 mi25120+514633+914633+924690(Top 87%)14126(Top 88%)14126(Top 250%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21story building
+97ft-345ft

Overall

26223

Males

15257

M18-39

15257

5K→10K

3.1 - 6.2 mi

Top 95%
×5story building
+79ft-138ft

Overall

26877

Males

15516

M18-39

15516

10K→15K

6.2 - 9.3 mi

Top 92%
×3story building
+67ft-78ft

Overall

26223

Males

15257

M18-39

15257

15K→20K

9.3 - 12.4 mi

Top 87%
×5story building
+106ft-86ft

Overall

24752

Males

14560

M18-39

14560

20K→Half

12.4 - 13.1 mi

Top 81%
×2story building
+19ft-37ft

Overall

22986

Males

13794

M18-39

13794

Half→25K

13.1 - 15.5 mi

Top 85%
×4story building
+66ft-88ft

Overall

24222

Males

14296

M18-39

14296

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

24547

Males

14330

M18-39

14330

30K→20M

18.6 - 20.0 mi

Top 85%
×5story building
+64ft-50ft

Overall

24023

Males

13999

M18-39

13999

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

23022

Males

13457

M18-39

13457

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

22503

Males

13162

M18-39

13162

35K→23M

21.8 - 23.0 mi

Top 82%
×5story building
+23ft-63ft

Overall

23183

Males

13423

M18-39

13423

23M→24M

23.0 - 24.0 mi

Top 86%
×6story building
+12ft-82ft

Overall

24529

Males

14071

M18-39

14071

24M→40K

24.0 - 24.9 mi

Top 88%
×1story
+6ft-20ft

Overall

25084

Males

14309

M18-39

14309

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24674

Males

14109

M18-39

14109

25.2M→Finish

25.2 - 26.2 mi

Top 87%
×2story building
+22ft-21ft

Overall

24690

Males

14126

M18-39

14126

Passing Analysis

Category:
Athletes Passed
2256
Passed By
247
Net Change
+2009
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#27129
5K → 10K21892+126#27129#27003
10K → 15K3039+294#27003#26709
15K → 20K4980+498#26709#26211
20K → Half1420+142#26211#26069
Half → 25K3192+317#26069#25752
25K → 30K24329+214#25752#25538
30K → 20M11513+102#25538#25436
20M → 21M1324+128#25436#25308
21M → 35K760+76#25308#25232
35K → 23M975+92#25232#25140
23M → 24M4922+27#25140#25113
24M → 40K2136-15#25113#25128
40K → 25.2M1310+3#25128#25125
25.2M → Finish3025+5#25125#25120
TOTALS2256247+2009
📊

Passing Visuals

Category:
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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