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BOSTON MARATHON 2023

Lucas Mast

Bib: 5814•M

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 19%
Gender (Male)
#0 / 15176
Top 30%
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
6:40/mi
20:44
↑ 97↓ 3451.5%
10K· 6.21 mi
6:38/mi
41:20
↑ 79↓ 1380.4%
15K· 9.32 mi
6:40/mi
1:02:03
↑ 67↓ 78
20K· 12.43 mi
6:47/mi
1:23:09
↑ 106↓ 860.1%
Half· 13.11 mi
6:42/mi
1:27:43
↑ 19↓ 370.5%
25K· 15.53 mi
6:50/mi
1:44:18
↑ 66↓ 880.2%
30K· 18.64 mi
7:12/mi
2:06:39
↑ 181↓ 1480.2%
20M
7:23/mi
2:16:41
↑ 64↓ 500.2%
21M
7:47/mi
2:24:28
↑ 106↓ 241.6%
35K· 21.75 mi
7:18/mi
2:29:56
↑ 17↓ 861.7%
23M
7:36/mi
2:39:27
↑ 23↓ 630.6%
24M
7:29/mi
2:46:56
↓ 821.3%
40K· 24.85 mi
7:37/mi
2:53:27
↓ 200.3%
25.2M
8:10/mi
2:56:16
↑ 13↓ 160.2%
Finish· 26.22 mi
7:28/mi
3:03:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:43
Pace6:41 /mi
2nd Half
Distance13.11 mi
Time1:36:10
Pace7:20 /mi
📊Positive Split: 9.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:0320:446:4020:44
6:40
-
10K
6.21 mi10:43:3941:206:3920:36
6:38
-0:02
15K
9.32 mi11:04:221:02:036:3920:43
6:40
+0:02
20K
12.43 mi11:25:281:23:096:4121:06
6:47
+0:07
Half
13.11 mi11:30:021:27:436:414:34
6:42
-0:05
25K
15.53 mi11:46:371:44:186:4316:35
6:50
+0:08
30K
18.64 mi12:08:582:06:396:4822:21
7:12
+0:22
20M
20.00 mi12:19:002:16:416:5010:02
7:23
+0:11
21M
21.00 mi12:26:472:24:286:537:47
7:47
+0:24
35K
21.75 mi12:32:152:29:566:545:28
7:18
-0:29
23M
23.00 mi12:41:462:39:276:569:31
7:36
+0:18
24M
24.00 mi12:49:152:46:566:577:29
7:29
-0:07
40K
24.85 mi12:55:462:53:276:596:31
7:37
+0:08
25.2M
25.20 mi12:58:352:56:167:002:49
8:10
+0:33
Finish
26.22 mi13:06:123:03:537:017:37
7:28
-0:42

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

6:38 /mi

Average Pace

7:01 /mi

Slowest Pace

8:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:18

57% of race

Time at Steady Pace

52:57

29% of race

Time at Slower Pace

26:38

14% of race

Average Pace: 7:01 /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 mi10:23:0320:446:4020:44
6:40
#3433
10K
6.21 mi10:43:3941:206:3920:36
6:38
#3558
15K
9.32 mi11:04:221:02:036:3920:43
6:40
#3615
20K
12.43 mi11:25:281:23:096:4121:06
6:47
#3775
Half
13.11 mi11:30:021:27:436:414:34
6:42
#3801
25K
15.53 mi11:46:371:44:186:4316:35
6:50
#3900
30K
18.64 mi12:08:582:06:396:4822:21
7:12
#4265
20M
20.00 mi12:19:002:16:416:5010:02
7:23
#4462
21M
21.00 mi12:26:472:24:286:537:47
7:47
#4580
35K
21.75 mi12:32:152:29:566:545:28
7:18
#4679
23M
23.00 mi12:41:462:39:276:569:31
7:36
#4805
24M
24.00 mi12:49:152:46:566:577:29
7:29
#4891
40K
24.85 mi12:55:462:53:276:596:31
7:37
#4953
25.2M
25.20 mi12:58:352:56:167:002:49
8:10
#4970
Finish
26.22 mi13:06:123:03:537:017:37
7:28
#5024
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3433323632363838(Top 14%)3609(Top 24%)3609(Top 68%)
10K6.21 mi3.10 mi3558-1253359-1233359-1233727(Top 14%)3522(Top 23%)3522(Top 67%)
15K9.32 mi3.11 mi3615-573417-583417-583838(Top 14%)3609(Top 24%)3609(Top 68%)
20K12.43 mi3.11 mi3775-1603566-1493566-1494372(Top 16%)4082(Top 27%)4082(Top 77%)
Half13.11 mi0.68 mi3801-263591-253591-254325(Top 16%)4049(Top 27%)4049(Top 77%)
25K15.53 mi2.42 mi3900-993674-833674-834510(Top 17%)4202(Top 28%)4202(Top 80%)
30K18.64 mi3.11 mi4265-3654001-3274001-3275452(Top 20%)4959(Top 33%)4959(Top 94%)
20M20.00 mi1.36 mi4462-1974165-1644165-1646072(Top 23%)5345(Top 35%)5345(Top 101%)
21M21.00 mi1.00 mi4580-1184269-1044269-1046065(Top 23%)5234(Top 34%)5234(Top 99%)
35K21.75 mi0.75 mi4679-994356-874356-877112(Top 27%)5952(Top 39%)5952(Top 113%)
23M23.00 mi1.25 mi4805-1264461-1054461-1057053(Top 26%)5848(Top 39%)5848(Top 111%)
24M24.00 mi1.00 mi4891-864523-624523-627544(Top 28%)6023(Top 40%)6023(Top 114%)
40K24.85 mi0.85 mi4953-624563-404563-407409(Top 28%)5869(Top 39%)5869(Top 111%)
25.2M25.20 mi0.35 mi4970-174577-144577-147397(Top 28%)5797(Top 38%)5797(Top 110%)
Finish26.22 mi1.02 mi5024-544617-404617-408314(Top 31%)6330(Top 42%)6330(Top 120%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 14%
×21story building
+97ft-345ft

Overall

3838

Males

3609

M18-39

3609

5K→10K

3.1 - 6.2 mi

Top 14%
×5story building
+79ft-138ft

Overall

3727

Males

3522

M18-39

3522

10K→15K

6.2 - 9.3 mi

Top 14%
×3story building
+67ft-78ft

Overall

3838

Males

3609

M18-39

3609

15K→20K

9.3 - 12.4 mi

Top 16%
×5story building
+106ft-86ft

Overall

4372

Males

4082

M18-39

4082

20K→Half

12.4 - 13.1 mi

Top 16%
×2story building
+19ft-37ft

Overall

4325

Males

4049

M18-39

4049

Half→25K

13.1 - 15.5 mi

Top 17%
×4story building
+66ft-88ft

Overall

4510

Males

4202

M18-39

4202

25K→30K

15.5 - 18.6 mi

Top 20%
×9story building
+181ft-148ft

Overall

5452

Males

4959

M18-39

4959

30K→20M

18.6 - 20.0 mi

Top 23%
×5story building
+64ft-50ft

Overall

6072

Males

5345

M18-39

5345

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6065

Males

5234

M18-39

5234

21M→35K

21.0 - 21.8 mi

Top 27%
×7story building
+17ft-86ft

Overall

7112

Males

5952

M18-39

5952

35K→23M

21.8 - 23.0 mi

Top 26%
×5story building
+23ft-63ft

Overall

7053

Males

5848

M18-39

5848

23M→24M

23.0 - 24.0 mi

Top 28%
×6story building
+12ft-82ft

Overall

7544

Males

6023

M18-39

6023

24M→40K

24.0 - 24.9 mi

Top 28%
×1story
+6ft-20ft

Overall

7409

Males

5869

M18-39

5869

40K→25.2M

24.9 - 25.2 mi

Top 28%
×1story
+13ft-16ft

Overall

7397

Males

5797

M18-39

5797

25.2M→Finish

25.2 - 26.2 mi

Top 31%
×2story building
+22ft-21ft

Overall

8314

Males

6330

M18-39

6330

Passing Analysis

Category:
Athletes Passed
595
Passed By
2186
Net Change
-1591
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3433
5K → 10K142267-125#3433#3558
10K → 15K90147-57#3558#3615
15K → 20K48208-160#3615#3775
20K → Half1339-26#3775#3801
Half → 25K52151-99#3801#3900
25K → 30K41406-365#3900#4265
30K → 20M25222-197#4265#4462
20M → 21M33151-118#4462#4580
21M → 35K23122-99#4580#4679
35K → 23M45171-126#4679#4805
23M → 24M24110-86#4805#4891
24M → 40K2688-62#4891#4953
40K → 25.2M926-17#4953#4970
25.2M → Finish2478-54#4970#5024
TOTALS5952186-1591
📊

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