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BOSTON MARATHON 2023

Leif Anderson

Bib: 410•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 1.0%
Gender (Male)
#0 / 15176
Top 1%
Division (M18-39)
#0 / 5285
Top 4%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
5:40/mi
17:35
↑ 97↓ 3451.5%
10K· 6.21 mi
5:40/mi
35:12
↑ 79↓ 1380.4%
15K· 9.32 mi
5:42/mi
52:53
↑ 67↓ 78
20K· 12.43 mi
5:47/mi
1:10:52
↑ 106↓ 860.1%
Half· 13.11 mi
5:39/mi
1:14:43
↑ 19↓ 370.5%
25K· 15.53 mi
5:50/mi
1:28:52
↑ 66↓ 880.2%
30K· 18.64 mi
5:55/mi
1:47:16
↑ 181↓ 1480.2%
20M
6:01/mi
1:55:26
↑ 64↓ 500.2%
21M
6:27/mi
2:01:53
↑ 106↓ 241.6%
35K· 21.75 mi
5:46/mi
2:06:12
↑ 17↓ 861.7%
23M
6:14/mi
2:14:00
↑ 23↓ 630.6%
24M
6:03/mi
2:20:03
↓ 821.3%
40K· 24.85 mi
6:00/mi
2:25:11
↓ 200.3%
25.2M
6:34/mi
2:27:27
↑ 13↓ 160.2%
Finish· 26.22 mi
5:51/mi
2:33:25
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:14:43
Pace5:42 /mi
2nd Half
Distance13.11 mi
Time1:18:42
Pace6:00 /mi
📊Positive Split: 5.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:17:4017:355:4017:35
5:40
-
10K
6.21 mi10:35:1735:125:4017:37
5:40
0:00
15K
9.32 mi10:52:5852:535:4017:41
5:42
+0:02
20K
12.43 mi11:10:571:10:525:4217:59
5:47
+0:05
Half
13.11 mi11:14:481:14:435:423:51
5:39
-0:08
25K
15.53 mi11:28:571:28:525:4314:09
5:50
+0:11
30K
18.64 mi11:47:211:47:165:4518:24
5:55
+0:05
20M
20.00 mi11:55:311:55:265:468:10
6:01
+0:06
21M
21.00 mi12:01:582:01:535:486:27
6:27
+0:26
35K
21.75 mi12:06:172:06:125:484:19
5:46
-0:41
23M
23.00 mi12:14:052:14:005:507:48
6:14
+0:28
24M
24.00 mi12:20:082:20:035:506:03
6:03
-0:11
40K
24.85 mi12:25:162:25:115:505:08
6:00
-0:03
25.2M
25.20 mi12:27:322:27:275:512:16
6:34
+0:34
Finish
26.22 mi12:33:302:33:255:515:58
5:51
-0:43

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

5:39 /mi

Average Pace

5:51 /mi

Slowest Pace

6:34 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:16:54

89% of race

Time at Steady Pace

16:31

11% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 5:51 /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 mi10:17:4017:355:4017:35
5:40
#229
10K
6.21 mi10:35:1735:125:4017:37
5:40
#254
15K
9.32 mi10:52:5852:535:4017:41
5:42
#246
20K
12.43 mi11:10:571:10:525:4217:59
5:47
#257
Half
13.11 mi11:14:481:14:435:423:51
5:39
#256
25K
15.53 mi11:28:571:28:525:4314:09
5:50
#263
30K
18.64 mi11:47:211:47:165:4518:24
5:55
#261
20M
20.00 mi11:55:311:55:265:468:10
6:01
#258
21M
21.00 mi12:01:582:01:535:486:27
6:27
#267
35K
21.75 mi12:06:172:06:125:484:19
5:46
#266
23M
23.00 mi12:14:052:14:005:507:48
6:14
#273
24M
24.00 mi12:20:082:20:035:506:03
6:03
#274
40K
24.85 mi12:25:162:25:115:505:08
6:00
#264
25.2M
25.20 mi12:27:322:27:275:512:16
6:34
#260
Finish
26.22 mi12:33:302:33:255:515:58
5:51
#253
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi229229229237(Top 0.9%)208(Top 1%)208(Top 4%)
10K6.21 mi3.10 mi254-25227+2227+2271(Top 1%)241(Top 2%)241(Top 5%)
15K9.32 mi3.11 mi246+8219+8219+8237(Top 0.9%)208(Top 1%)208(Top 4%)
20K12.43 mi3.11 mi257-11229-10229-10289(Top 1%)261(Top 2%)261(Top 5%)
Half13.11 mi0.68 mi256+1228+1228+1223(Top 0.8%)201(Top 1%)201(Top 4%)
25K15.53 mi2.42 mi263-7235-7235-7322(Top 1%)294(Top 2%)294(Top 6%)
30K18.64 mi3.11 mi261+2234+1234+1284(Top 1%)260(Top 2%)260(Top 5%)
20M20.00 mi1.36 mi258+3233+1233+1352(Top 1%)325(Top 2%)325(Top 6%)
21M21.00 mi1.00 mi267-9241-8241-8553(Top 2%)519(Top 3%)519(Top 10%)
35K21.75 mi0.75 mi266+1240+1240+1302(Top 1%)276(Top 2%)276(Top 5%)
23M23.00 mi1.25 mi273-7246-6246-6660(Top 2%)622(Top 4%)622(Top 12%)
24M24.00 mi1.00 mi274-1246246631(Top 2%)596(Top 4%)596(Top 11%)
40K24.85 mi0.85 mi264+10237+9237+9341(Top 1%)317(Top 2%)317(Top 6%)
25.2M25.20 mi0.35 mi260+4233+4233+4588(Top 2%)555(Top 4%)555(Top 11%)
Finish26.22 mi1.02 mi253+7227+6227+6449(Top 2%)426(Top 3%)426(Top 8%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 0.9%
×21story building
+97ft-345ft

Overall

237

Males

208

M18-39

208

5K→10K

3.1 - 6.2 mi

Top 1%
×5story building
+79ft-138ft

Overall

271

Males

241

M18-39

241

10K→15K

6.2 - 9.3 mi

Top 0.9%
×3story building
+67ft-78ft

Overall

237

Males

208

M18-39

208

15K→20K

9.3 - 12.4 mi

Top 1%
×5story building
+106ft-86ft

Overall

289

Males

261

M18-39

261

20K→Half

12.4 - 13.1 mi

Top 0.8%
×2story building
+19ft-37ft

Overall

223

Males

201

M18-39

201

Half→25K

13.1 - 15.5 mi

Top 1%
×4story building
+66ft-88ft

Overall

322

Males

294

M18-39

294

25K→30K

15.5 - 18.6 mi

Top 1%
×9story building
+181ft-148ft

Overall

284

Males

260

M18-39

260

30K→20M

18.6 - 20.0 mi

Top 1%
×5story building
+64ft-50ft

Overall

352

Males

325

M18-39

325

20M→21M

20.0 - 21.0 mi

Top 2%
×8story building
+106ft-24ft

Overall

553

Males

519

M18-39

519

21M→35K

21.0 - 21.8 mi

Top 1%
×7story building
+17ft-86ft

Overall

302

Males

276

M18-39

276

35K→23M

21.8 - 23.0 mi

Top 2%
×5story building
+23ft-63ft

Overall

660

Males

622

M18-39

622

23M→24M

23.0 - 24.0 mi

Top 2%
×6story building
+12ft-82ft

Overall

631

Males

596

M18-39

596

24M→40K

24.0 - 24.9 mi

Top 1%
×1story
+6ft-20ft

Overall

341

Males

317

M18-39

317

40K→25.2M

24.9 - 25.2 mi

Top 2%
×1story
+13ft-16ft

Overall

588

Males

555

M18-39

555

25.2M→Finish

25.2 - 26.2 mi

Top 2%
×2story building
+22ft-21ft

Overall

449

Males

426

M18-39

426

Passing Analysis

Category:
Athletes Passed
110
Passed By
134
Net Change
-24
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#229
5K → 10K1843-25#229#254
10K → 15K135+8#254#246
15K → 20K415-11#246#257
20K → Half21+1#257#256
Half → 25K512-7#256#263
25K → 30K1614+2#263#261
30K → 20M74+3#261#258
20M → 21M312-9#258#267
21M → 35K32+1#267#266
35K → 23M613-7#266#273
23M → 24M56-1#273#274
24M → 40K122+10#274#264
40K → 25.2M40+4#264#260
25.2M → Finish125+7#260#253
TOTALS110134-24
📊

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