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BOSTON MARATHON 2023

Derek Alcorn

Bib: 985•M

CA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 0.6%
Gender (Male)
#0 / 15176
Top 1.0%
Division (M18-39)
#0 / 5285
Top 2%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
17:41
Rank: #259
Start → 5K
17:41 | 5:42/mi
10K· 6.21 mi
35:12
Rank: #252 (+7)
5K → 10K
17:31 | 5:38/mi
15K· 9.32 mi
52:41
Rank: #218 (+34)
10K → 15K
17:29 | 5:38/mi
20K· 12.43 mi
1:10:09
Rank: #201 (+17)
15K → 20K
17:28 | 5:37/mi
Half· 13.11 mi
1:14:00
Rank: #201
20K → Half
3:51 | 5:39/mi
25K· 15.53 mi
1:27:56
Rank: #194 (+7)
Half → 25K
13:56 | 5:45/mi
30K· 18.64 mi
1:46:18
Rank: #192 (+2)
25K → 30K
18:22 | 5:55/mi
20M
1:54:17
Rank: #189 (+3)
30K → 20M
7:59 | 5:52/mi
21M
2:00:25
Rank: #187 (+2)
20M → 21M
6:08 | 6:08/mi
35K· 21.75 mi
2:04:35
Rank: #182 (+5)
21M → 35K
4:10 | 5:34/mi
23M
2:11:53
Rank: #176 (+6)
35K → 23M
7:18 | 5:50/mi
24M
2:17:32
Rank: #168 (+8)
23M → 24M
5:39 | 5:39/mi
40K· 24.85 mi
2:22:40
Rank: #167 (+1)
24M → 40K
5:08 | 6:00/mi
25.2M
2:24:54
Rank: #166 (+1)
40K → 25.2M
2:14 | 6:29/mi
Finish· 26.22 mi
2:30:42
Rank: #167 (-1)
25.2M → Finish
5:48 | 5:41/mi

Course Map & Elevation

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:14:00
Pace5:39 /mi
2nd Half
Distance13.11 mi
Time1:16:42
Pace5:51 /mi
📊Positive Split: 3.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:5417:415:4217:41
5:42
-
10K
6.21 mi10:35:2535:125:4017:31
5:38
-0:04
15K
9.32 mi10:52:5452:415:3917:29
5:38
0:00
20K
12.43 mi11:10:221:10:095:3917:28
5:37
-0:01
Half
13.11 mi11:14:131:14:005:393:51
5:39
+0:02
25K
15.53 mi11:28:091:27:565:4013:56
5:45
+0:06
30K
18.64 mi11:46:311:46:185:4218:22
5:55
+0:10
20M
20.00 mi11:54:301:54:175:437:59
5:52
-0:03
21M
21.00 mi12:00:382:00:255:446:08
6:08
+0:16
35K
21.75 mi12:04:482:04:355:444:10
5:34
-0:34
23M
23.00 mi12:12:062:11:535:447:18
5:50
+0:16
24M
24.00 mi12:17:452:17:325:445:39
5:39
-0:11
40K
24.85 mi12:22:532:22:405:445:08
6:00
+0:21
25.2M
25.20 mi12:25:072:24:545:452:14
6:29
+0:29
Finish
26.22 mi12:30:552:30:425:455:48
5:41
-0:48

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

5:34 /mi

Average Pace

5:45 /mi

Slowest Pace

6:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:22:20

94% of race

Time at Steady Pace

8:22

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:45 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:17:5417:415:4217:41
5:42
#259
10K
6.21 mi10:35:2535:125:4017:31
5:38
#252
15K
9.32 mi10:52:5452:415:3917:29
5:38
#218
20K
12.43 mi11:10:221:10:095:3917:28
5:37
#201
Half
13.11 mi11:14:131:14:005:393:51
5:39
#201
25K
15.53 mi11:28:091:27:565:4013:56
5:45
#194
30K
18.64 mi11:46:311:46:185:4218:22
5:55
#192
20M
20.00 mi11:54:301:54:175:437:59
5:52
#189
21M
21.00 mi12:00:382:00:255:446:08
6:08
#187
35K
21.75 mi12:04:482:04:355:444:10
5:34
#182
23M
23.00 mi12:12:062:11:535:447:18
5:50
#176
24M
24.00 mi12:17:452:17:325:445:39
5:39
#168
40K
24.85 mi12:22:532:22:405:445:08
6:00
#167
25.2M
25.20 mi12:25:072:24:545:452:14
6:29
#166
Finish
26.22 mi12:30:552:30:425:455:48
5:41
#167
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi259259259167(Top 0.6%)141(Top 0.9%)141(Top 3%)
10K6.21 mi3.10 mi252+7225+34225+34230(Top 0.9%)202(Top 1%)202(Top 4%)
15K9.32 mi3.11 mi218+34191+34191+34167(Top 0.6%)141(Top 0.9%)141(Top 3%)
20K12.43 mi3.11 mi201+17175+16175+16149(Top 0.6%)127(Top 0.8%)127(Top 2%)
Half13.11 mi0.68 mi201175175213(Top 0.8%)191(Top 1%)191(Top 4%)
25K15.53 mi2.42 mi194+7169+6169+6210(Top 0.8%)187(Top 1%)187(Top 4%)
30K18.64 mi3.11 mi192+2169169265(Top 1.0%)241(Top 2%)241(Top 5%)
20M20.00 mi1.36 mi189+3166+3166+3226(Top 0.8%)204(Top 1%)204(Top 4%)
21M21.00 mi1.00 mi187+2164+2164+2183(Top 0.7%)162(Top 1%)162(Top 3%)
35K21.75 mi0.75 mi182+5160+4160+4131(Top 0.5%)110(Top 0.7%)110(Top 2%)
23M23.00 mi1.25 mi176+6154+6154+6150(Top 0.6%)129(Top 0.9%)129(Top 2%)
24M24.00 mi1.00 mi168+8146+8146+8144(Top 0.5%)126(Top 0.8%)126(Top 2%)
40K24.85 mi0.85 mi167+1144+2144+2334(Top 1%)310(Top 2%)310(Top 6%)
25.2M25.20 mi0.35 mi166+1143+1143+1440(Top 2%)414(Top 3%)414(Top 8%)
Finish26.22 mi1.02 mi167-1146-3146-3219(Top 0.8%)202(Top 1%)202(Top 4%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.6%
×21stories
+97ft-345ft

Overall

167

Males

141

M18-39

141

5K→10K

3.1 - 6.2 mi

Top 0.9%
×5stories
+79ft-138ft

Overall

230

Males

202

M18-39

202

10K→15K

6.2 - 9.3 mi

Top 0.6%
×3stories
+67ft-78ft

Overall

167

Males

141

M18-39

141

15K→20K

9.3 - 12.4 mi

Top 0.6%
×5stories
+106ft-86ft

Overall

149

Males

127

M18-39

127

20K→Half

12.4 - 13.1 mi

Top 0.8%
×2stories
+19ft-37ft

Overall

213

Males

191

M18-39

191

Half→25K

13.1 - 15.5 mi

Top 0.8%
×4stories
+66ft-88ft

Overall

210

Males

187

M18-39

187

25K→30K

15.5 - 18.6 mi

Top 1.0%
×9stories
+181ft-148ft

Overall

265

Males

241

M18-39

241

30K→20M

18.6 - 20.0 mi

Top 0.8%
×5stories
+64ft-50ft

Overall

226

Males

204

M18-39

204

20M→21M

20.0 - 21.0 mi

Top 0.7%
×8stories
+106ft-24ft

Overall

183

Males

162

M18-39

162

21M→35K

21.0 - 21.8 mi

Top 0.5%
×7stories
+17ft-86ft

Overall

131

Males

110

M18-39

110

35K→23M

21.8 - 23.0 mi

Top 0.6%
×5stories
+23ft-63ft

Overall

150

Males

129

M18-39

129

23M→24M

23.0 - 24.0 mi

Top 0.5%
×6stories
+12ft-82ft

Overall

144

Males

126

M18-39

126

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

334

Males

310

M18-39

310

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

440

Males

414

M18-39

414

25.2M→Finish

25.2 - 26.2 mi

Top 0.8%
×2stories
+22ft-21ft

Overall

219

Males

202

M18-39

202

Passing Analysis

Category:
Athletes Passed
153
Passed By
61
Net Change
+92
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#259
5K → 10K3932+7#259#252
10K → 15K340+34#252#218
15K → 20K192+17#218#201
20K → Half110#201#201
Half → 25K103+7#201#194
25K → 30K108+2#194#192
30K → 20M41+3#192#189
20M → 21M20+2#189#187
21M → 35K50+5#187#182
35K → 23M82+6#182#176
23M → 24M80+8#176#168
24M → 40K65+1#168#167
40K → 25.2M32+1#167#166
25.2M → Finish45-1#166#167
TOTALS15361+92
📊

Passing Visuals

Category:

📈Position Graph

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🎨Heatmap Timeline

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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