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BOSTON MARATHON 2023

Alexander Dion

Bib: 30881•M

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Gender (Male)
#0 / 15176
Division (M18-39)
#0 / 5285
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
10:53/mi
33:49
↑ 97↓ 3451.5%
10K· 6.21 mi
10:00/mi
1:04:54
↑ 79↓ 1380.4%
15K· 9.32 mi
9:17/mi
1:33:45
↑ 67↓ 78
20K· 12.43 mi
9:36/mi
2:03:33
↑ 106↓ 860.1%
Half· 13.11 mi
9:48/mi
2:10:14
↑ 19↓ 370.5%
25K· 15.53 mi
10:06/mi
2:34:44
↑ 66↓ 880.2%
30K· 18.64 mi
10:23/mi
3:07:00
↑ 181↓ 1480.2%
20M
10:28/mi
3:21:14
↑ 64↓ 500.2%
21M
11:21/mi
3:32:35
↑ 106↓ 241.6%
35K· 21.75 mi
9:37/mi
3:39:47
↑ 17↓ 861.7%
23M
10:39/mi
3:53:07
↑ 23↓ 630.6%
24M
10:05/mi
4:03:12
↓ 821.3%
40K· 24.85 mi
10:48/mi
4:12:26
↓ 200.3%
25.2M
11:01/mi
4:16:14
↑ 13↓ 160.2%
Finish· 26.22 mi
9:26/mi
4:25:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:10:14
Pace9:56 /mi
2nd Half
Distance13.11 mi
Time2:15:37
Pace10:21 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:4433:4910:5333:49
10:53
-
10K
6.21 mi12:23:491:04:5410:2731:05
10:00
-0:53
15K
9.32 mi12:52:401:33:4510:0428:51
9:17
-0:43
20K
12.43 mi13:22:282:03:339:5729:48
9:36
+0:19
Half
13.11 mi13:29:092:10:149:566:41
9:48
+0:12
25K
15.53 mi13:53:392:34:449:5824:30
10:06
+0:18
30K
18.64 mi14:25:553:07:0010:0232:16
10:23
+0:17
20M
20.00 mi14:40:093:21:1410:0414:14
10:28
+0:05
21M
21.00 mi14:51:303:32:3510:0711:21
11:21
+0:53
35K
21.75 mi14:58:423:39:4710:067:12
9:37
-1:44
23M
23.00 mi15:12:023:53:0710:0813:20
10:39
+1:02
24M
24.00 mi15:22:074:03:1210:0810:05
10:05
-0:34
40K
24.85 mi15:31:214:12:2610:099:14
10:48
+0:43
25.2M
25.20 mi15:35:094:16:1410:103:48
11:01
+0:13
Finish
26.22 mi15:44:464:25:5110:099:37
9:26
-1:35

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

9:17 /mi

Average Pace

10:09 /mi

Slowest Pace

11:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:15:28

28% of race

Time at Steady Pace

1:44:37

39% of race

Time at Slower Pace

1:25:46

32% of race

Average Pace: 10:08 /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 mi11:52:4433:4910:5333:49
10:53
#25511
10K
6.21 mi12:23:491:04:5410:2731:05
10:00
#24593
15K
9.32 mi12:52:401:33:4510:0428:51
9:17
#23721
20K
12.43 mi13:22:282:03:339:5729:48
9:36
#23301
Half
13.11 mi13:29:092:10:149:566:41
9:48
#23280
25K
15.53 mi13:53:392:34:449:5824:30
10:06
#23096
30K
18.64 mi14:25:553:07:0010:0232:16
10:23
#22858
20M
20.00 mi14:40:093:21:1410:0414:14
10:28
#22761
21M
21.00 mi14:51:303:32:3510:0711:21
11:21
#22712
35K
21.75 mi14:58:423:39:4710:067:12
9:37
#22621
23M
23.00 mi15:12:023:53:0710:0813:20
10:39
#22563
24M
24.00 mi15:22:074:03:1210:0810:05
10:05
#22495
40K
24.85 mi15:31:214:12:2610:099:14
10:48
#22472
25.2M
25.20 mi15:35:094:16:1410:103:48
11:01
#22440
Finish
26.22 mi15:44:464:25:5110:099:37
9:26
#22377
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi25511147581475821590(Top 81%)13018(Top 86%)13018(Top 246%)
10K6.21 mi3.10 mi24593+91814364+39414364+39423688(Top 89%)13943(Top 92%)13943(Top 264%)
15K9.32 mi3.11 mi23721+87213961+40313961+40321590(Top 81%)13018(Top 86%)13018(Top 246%)
20K12.43 mi3.11 mi23301+42013770+19113770+19121824(Top 82%)13107(Top 86%)13107(Top 248%)
Half13.11 mi0.68 mi23280+2113758+1213758+1222836(Top 86%)13549(Top 89%)13549(Top 256%)
25K15.53 mi2.42 mi23096+18413665+9313665+9322437(Top 84%)13335(Top 88%)13335(Top 252%)
30K18.64 mi3.11 mi22858+23813529+13613529+13621962(Top 82%)13056(Top 86%)13056(Top 247%)
20M20.00 mi1.36 mi22761+9713472+5713472+5721670(Top 81%)12857(Top 85%)12857(Top 243%)
21M21.00 mi1.00 mi22712+4913434+3813434+3821592(Top 81%)12794(Top 84%)12794(Top 242%)
35K21.75 mi0.75 mi22621+9113380+5413380+5420216(Top 76%)12139(Top 80%)12139(Top 230%)
23M23.00 mi1.25 mi22563+5813350+3013350+3021653(Top 81%)12753(Top 84%)12753(Top 241%)
24M24.00 mi1.00 mi22495+6813318+3213318+3221021(Top 79%)12443(Top 82%)12443(Top 235%)
40K24.85 mi0.85 mi22472+2313294+2413294+2421928(Top 82%)12791(Top 84%)12791(Top 242%)
25.2M25.20 mi0.35 mi22440+3213277+1713277+1720501(Top 77%)12168(Top 80%)12168(Top 230%)
Finish26.22 mi1.02 mi22377+6313242+3513242+3519898(Top 75%)11943(Top 79%)11943(Top 226%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

21590

Males

13018

M18-39

13018

5K→10K

3.1 - 6.2 mi

Top 89%
×5story building
+79ft-138ft

Overall

23688

Males

13943

M18-39

13943

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

21590

Males

13018

M18-39

13018

15K→20K

9.3 - 12.4 mi

Top 82%
×5story building
+106ft-86ft

Overall

21824

Males

13107

M18-39

13107

20K→Half

12.4 - 13.1 mi

Top 86%
×2story building
+19ft-37ft

Overall

22836

Males

13549

M18-39

13549

Half→25K

13.1 - 15.5 mi

Top 84%
×4story building
+66ft-88ft

Overall

22437

Males

13335

M18-39

13335

25K→30K

15.5 - 18.6 mi

Top 82%
×9story building
+181ft-148ft

Overall

21962

Males

13056

M18-39

13056

30K→20M

18.6 - 20.0 mi

Top 81%
×5story building
+64ft-50ft

Overall

21670

Males

12857

M18-39

12857

20M→21M

20.0 - 21.0 mi

Top 81%
×8story building
+106ft-24ft

Overall

21592

Males

12794

M18-39

12794

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

20216

Males

12139

M18-39

12139

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

21653

Males

12753

M18-39

12753

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

21021

Males

12443

M18-39

12443

24M→40K

24.0 - 24.9 mi

Top 82%
×1story
+6ft-20ft

Overall

21928

Males

12791

M18-39

12791

40K→25.2M

24.9 - 25.2 mi

Top 77%
×1story
+13ft-16ft

Overall

20501

Males

12168

M18-39

12168

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

19898

Males

11943

M18-39

11943

Passing Analysis

Category:
Athletes Passed
3314
Passed By
180
Net Change
+3134
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#25511
5K → 10K9235+918#25511#24593
10K → 15K8742+872#24593#23721
15K → 20K4255+420#23721#23301
20K → Half3110+21#23301#23280
Half → 25K21228+184#23280#23096
25K → 30K25820+238#23096#22858
30K → 20M11316+97#22858#22761
20M → 21M7324+49#22761#22712
21M → 35K921+91#22712#22621
35K → 23M9537+58#22621#22563
23M → 24M757+68#22563#22495
24M → 40K3916+23#22495#22472
40K → 25.2M353+32#22472#22440
25.2M → Finish696+63#22440#22377
TOTALS3314180+3134
📊

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