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BOSTON MARATHON 2023

Liam Collins

Bib: 521•M

TX

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 0.4%
Gender (Male)
#0 / 15176
Top 0.6%
Division (M18-39)
#0 / 5285
Top 2%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
16:46
Rank: #79
Start → 5K
16:46 | 5:24/mi
10K· 6.21 mi
33:48
Rank: #102 (-23)
5K → 10K
17:02 | 5:29/mi
15K· 9.32 mi
51:08
Rank: #115 (-13)
10K → 15K
17:20 | 5:35/mi
20K· 12.43 mi
1:08:33
Rank: #117 (-2)
15K → 20K
17:25 | 5:36/mi
Half· 13.11 mi
1:12:17
Rank: #117
20K → Half
3:44 | 5:28/mi
25K· 15.53 mi
1:26:03
Rank: #122 (-5)
Half → 25K
13:46 | 5:41/mi
30K· 18.64 mi
1:43:49
Rank: #120 (+2)
25K → 30K
17:46 | 5:43/mi
20M
1:51:35
Rank: #120
30K → 20M
7:46 | 5:43/mi
21M
1:57:46
Rank: #122 (-2)
20M → 21M
6:11 | 6:11/mi
35K· 21.75 mi
2:02:01
Rank: #118 (+4)
21M → 35K
4:15 | 5:41/mi
23M
2:09:22
Rank: #118
35K → 23M
7:21 | 5:52/mi
24M
2:15:03
Rank: #116 (+2)
23M → 24M
5:41 | 5:41/mi
40K· 24.85 mi
2:20:15
Rank: #116
24M → 40K
5:12 | 6:05/mi
25.2M
2:22:30
Rank: #115 (+1)
40K → 25.2M
2:15 | 6:31/mi
Finish· 26.22 mi
2:28:23
Rank: #116 (-1)
25.2M → Finish
5:53 | 5:46/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:12:17
Pace5:31 /mi
2nd Half
Distance13.11 mi
Time1:16:06
Pace5:48 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:16:5116:465:2416:46
5:24
-
10K
6.21 mi10:33:5333:485:2617:02
5:29
+0:05
15K
9.32 mi10:51:1351:085:2917:20
5:35
+0:06
20K
12.43 mi11:08:381:08:335:3117:25
5:36
+0:01
Half
13.11 mi11:12:221:12:175:313:44
5:28
-0:08
25K
15.53 mi11:26:081:26:035:3213:46
5:41
+0:13
30K
18.64 mi11:43:541:43:495:3417:46
5:43
+0:02
20M
20.00 mi11:51:401:51:355:357:46
5:43
0:00
21M
21.00 mi11:57:511:57:465:366:11
6:11
+0:28
35K
21.75 mi12:02:062:02:015:374:15
5:41
-0:30
23M
23.00 mi12:09:272:09:225:377:21
5:52
+0:11
24M
24.00 mi12:15:082:15:035:385:41
5:41
-0:11
40K
24.85 mi12:20:202:20:155:395:12
6:05
+0:24
25.2M
25.20 mi12:22:352:22:305:392:15
6:31
+0:26
Finish
26.22 mi12:28:282:28:235:405:53
5:46
-0:45

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

5:24 /mi

Average Pace

5:40 /mi

Slowest Pace

6:31 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

37:32

25% of race

Time at Steady Pace

1:29:52

61% of race

Time at Slower Pace

20:59

14% of race

Average Pace: 5:40 /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 mi10:16:5116:465:2416:46
5:24
#79
10K
6.21 mi10:33:5333:485:2617:02
5:29
#102
15K
9.32 mi10:51:1351:085:2917:20
5:35
#115
20K
12.43 mi11:08:381:08:335:3117:25
5:36
#117
Half
13.11 mi11:12:221:12:175:313:44
5:28
#117
25K
15.53 mi11:26:081:26:035:3213:46
5:41
#122
30K
18.64 mi11:43:541:43:495:3417:46
5:43
#120
20M
20.00 mi11:51:401:51:355:357:46
5:43
#120
21M
21.00 mi11:57:511:57:465:366:11
6:11
#122
35K
21.75 mi12:02:062:02:015:374:15
5:41
#118
23M
23.00 mi12:09:272:09:225:377:21
5:52
#118
24M
24.00 mi12:15:082:15:035:385:41
5:41
#116
40K
24.85 mi12:20:202:20:155:395:12
6:05
#116
25.2M
25.20 mi12:22:352:22:305:392:15
6:31
#115
Finish
26.22 mi12:28:282:28:235:405:53
5:46
#116
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi797979150(Top 0.6%)125(Top 0.8%)125(Top 2%)
10K6.21 mi3.10 mi102-23102-23102-23135(Top 0.5%)112(Top 0.7%)112(Top 2%)
15K9.32 mi3.11 mi115-13104-2104-2150(Top 0.6%)125(Top 0.8%)125(Top 2%)
20K12.43 mi3.11 mi117-2101+3101+3142(Top 0.5%)121(Top 0.8%)121(Top 2%)
Half13.11 mi0.68 mi117101101102(Top 0.4%)91(Top 0.6%)91(Top 2%)
25K15.53 mi2.42 mi122-5104-3104-3160(Top 0.6%)139(Top 0.9%)139(Top 3%)
30K18.64 mi3.11 mi120+2102+2102+2115(Top 0.4%)96(Top 0.6%)96(Top 2%)
20M20.00 mi1.36 mi120102102114(Top 0.4%)95(Top 0.6%)95(Top 2%)
21M21.00 mi1.00 mi122-2104-2104-2218(Top 0.8%)194(Top 1%)194(Top 4%)
35K21.75 mi0.75 mi118+4100+4100+4194(Top 0.7%)171(Top 1%)171(Top 3%)
23M23.00 mi1.25 mi11899+199+1181(Top 0.7%)158(Top 1%)158(Top 3%)
24M24.00 mi1.00 mi116+297+297+2158(Top 0.6%)138(Top 0.9%)138(Top 3%)
40K24.85 mi0.85 mi1169797442(Top 2%)415(Top 3%)415(Top 8%)
25.2M25.20 mi0.35 mi115+196+196+1509(Top 2%)477(Top 3%)477(Top 9%)
Finish26.22 mi1.02 mi116-197-197-1314(Top 1%)296(Top 2%)296(Top 6%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.6%
×21stories
+97ft-345ft

Overall

150

Males

125

M18-39

125

5K→10K

3.1 - 6.2 mi

Top 0.5%
×5stories
+79ft-138ft

Overall

135

Males

112

M18-39

112

10K→15K

6.2 - 9.3 mi

Top 0.6%
×3stories
+67ft-78ft

Overall

150

Males

125

M18-39

125

15K→20K

9.3 - 12.4 mi

Top 0.5%
×5stories
+106ft-86ft

Overall

142

Males

121

M18-39

121

20K→Half

12.4 - 13.1 mi

Top 0.4%
×2stories
+19ft-37ft

Overall

102

Males

91

M18-39

91

Half→25K

13.1 - 15.5 mi

Top 0.6%
×4stories
+66ft-88ft

Overall

160

Males

139

M18-39

139

25K→30K

15.5 - 18.6 mi

Top 0.4%
×9stories
+181ft-148ft

Overall

115

Males

96

M18-39

96

30K→20M

18.6 - 20.0 mi

Top 0.4%
×5stories
+64ft-50ft

Overall

114

Males

95

M18-39

95

20M→21M

20.0 - 21.0 mi

Top 0.8%
×8stories
+106ft-24ft

Overall

218

Males

194

M18-39

194

21M→35K

21.0 - 21.8 mi

Top 0.7%
×7stories
+17ft-86ft

Overall

194

Males

171

M18-39

171

35K→23M

21.8 - 23.0 mi

Top 0.7%
×5stories
+23ft-63ft

Overall

181

Males

158

M18-39

158

23M→24M

23.0 - 24.0 mi

Top 0.6%
×6stories
+12ft-82ft

Overall

158

Males

138

M18-39

138

24M→40K

24.0 - 24.9 mi

Top 2%
×1story
+6ft-20ft

Overall

442

Males

415

M18-39

415

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

509

Males

477

M18-39

477

25.2M→Finish

25.2 - 26.2 mi

Top 1%
×2stories
+22ft-21ft

Overall

314

Males

296

M18-39

296

Passing Analysis

Category:
Athletes Passed
29
Passed By
66
Net Change
-37
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#79
5K → 10K124-23#79#102
10K → 15K215-13#102#115
15K → 20K46-2#115#117
20K → Half110#117#117
Half → 25K16-5#117#122
25K → 30K64+2#122#120
30K → 20M110#120#120
20M → 21M02-2#120#122
21M → 35K40+4#122#118
35K → 23M220#118#118
23M → 24M20+2#118#116
24M → 40K330#116#116
40K → 25.2M10+1#116#115
25.2M → Finish12-1#115#116
TOTALS2966-37
📊

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