Boston Marathon logo
BOSTON MARATHON 2023

Lars Madsen

Bib: 29775•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M45-49)
#0 / 2252
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
10:09/mi
31:31
↑ 97↓ 3451.5%
10K· 6.21 mi
9:44/mi
1:01:44
↑ 79↓ 1380.4%
15K· 9.32 mi
9:34/mi
1:31:27
↑ 67↓ 78
20K· 12.43 mi
9:39/mi
2:01:25
↑ 106↓ 860.1%
Half· 13.11 mi
9:40/mi
2:08:01
↑ 19↓ 370.5%
25K· 15.53 mi
10:47/mi
2:34:09
↑ 66↓ 880.2%
30K· 18.64 mi
12:13/mi
3:12:06
↑ 181↓ 1480.2%
20M
12:42/mi
3:29:22
↑ 64↓ 500.2%
21M
15:05/mi
3:44:27
↑ 106↓ 241.6%
35K· 21.75 mi
13:38/mi
3:54:39
↑ 17↓ 861.7%
23M
13:54/mi
4:12:03
↑ 23↓ 630.6%
24M
12:39/mi
4:24:42
↓ 821.3%
40K· 24.85 mi
14:03/mi
4:36:43
↓ 200.3%
25.2M
14:50/mi
4:41:50
↑ 13↓ 160.2%
Finish· 26.22 mi
11:45/mi
4:53:48
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:08:01
Pace9:46 /mi
2nd Half
Distance13.11 mi
Time2:45:47
Pace12:39 /mi
📊Positive Split: 29.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:50:3831:3110:0931:31
10:09
-
10K
6.21 mi12:20:511:01:449:5630:13
9:44
-0:25
15K
9.32 mi12:50:341:31:279:4929:43
9:34
-0:10
20K
12.43 mi13:20:322:01:259:4629:58
9:39
+0:05
Half
13.11 mi13:27:082:08:019:466:36
9:40
+0:01
25K
15.53 mi13:53:162:34:099:5526:08
10:47
+1:07
30K
18.64 mi14:31:133:12:0610:1837:57
12:13
+1:26
20M
20.00 mi14:48:293:29:2210:2817:16
12:42
+0:29
21M
21.00 mi15:03:343:44:2710:4115:05
15:05
+2:23
35K
21.75 mi15:13:463:54:3910:4710:12
13:38
-1:27
23M
23.00 mi15:31:104:12:0310:5817:24
13:54
+0:16
24M
24.00 mi15:43:494:24:4211:0212:39
12:39
-1:15
40K
24.85 mi15:55:504:36:4311:0812:01
14:03
+1:24
25.2M
25.20 mi16:00:574:41:5011:115:07
14:50
+0:47
Finish
26.22 mi16:12:554:53:4811:1311:58
11:45
-3:05

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

9:34 /mi

Average Pace

11:13 /mi

Slowest Pace

15:05 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:34:09

52% of race

Time at Steady Pace

1:19:50

27% of race

Time at Slower Pace

59:49

20% of race

Average Pace: 11:12 /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 mi11:50:3831:3110:0931:31
10:09
#23792
10K
6.21 mi12:20:511:01:449:5630:13
9:44
#23475
15K
9.32 mi12:50:341:31:279:4929:43
9:34
#23172
20K
12.43 mi13:20:322:01:259:4629:58
9:39
#22845
Half
13.11 mi13:27:082:08:019:466:36
9:40
#22838
25K
15.53 mi13:53:162:34:099:5526:08
10:47
#23005
30K
18.64 mi14:31:133:12:0610:1837:57
12:13
#23459
20M
20.00 mi14:48:293:29:2210:2817:16
12:42
#23584
21M
21.00 mi15:03:343:44:2710:4115:05
15:05
#23847
35K
21.75 mi15:13:463:54:3910:4710:12
13:38
#23992
23M
23.00 mi15:31:104:12:0310:5817:24
13:54
#24169
24M
24.00 mi15:43:494:24:4211:0212:39
12:39
#24237
40K
24.85 mi15:55:504:36:4311:0812:01
14:03
#24339
25.2M
25.20 mi16:00:574:41:5011:115:07
14:50
#24388
Finish
26.22 mi16:12:554:53:4811:1311:58
11:45
#24427
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi23792139821398222432(Top 84%)13385(Top 88%)13385(Top 594%)
10K6.21 mi3.10 mi23475+31713845+13713845+13723102(Top 87%)13693(Top 90%)13693(Top 608%)
15K9.32 mi3.11 mi23172+30313712+13313712+13322432(Top 84%)13385(Top 88%)13385(Top 594%)
20K12.43 mi3.11 mi22845+32713554+15813554+15821985(Top 83%)13175(Top 87%)13175(Top 585%)
Half13.11 mi0.68 mi22838+7135541355422586(Top 85%)13446(Top 89%)13446(Top 597%)
25K15.53 mi2.42 mi23005-16713621-6713621-6723637(Top 89%)13865(Top 91%)13865(Top 616%)
30K18.64 mi3.11 mi23459-45413817-19613817-19624723(Top 93%)14291(Top 94%)14291(Top 635%)
20M20.00 mi1.36 mi23584-12513859-4213859-4224925(Top 94%)14339(Top 94%)14339(Top 637%)
21M21.00 mi1.00 mi23847-26313973-11413973-11425767(Top 97%)14752(Top 97%)14752(Top 655%)
35K21.75 mi0.75 mi23992-14514027-5414027-5425965(Top 98%)14822(Top 98%)14822(Top 658%)
23M23.00 mi1.25 mi24169-17714089-6214089-6225759(Top 97%)14708(Top 97%)14708(Top 653%)
24M24.00 mi1.00 mi24237-6814116-2714116-2725198(Top 95%)14391(Top 95%)14391(Top 639%)
40K24.85 mi0.85 mi24339-10214158-4214158-4225715(Top 97%)14659(Top 97%)14659(Top 651%)
25.2M25.20 mi0.35 mi24388-4914174-1614174-1625602(Top 96%)14603(Top 96%)14603(Top 648%)
Finish26.22 mi1.02 mi24427-3914187-1314187-1324977(Top 94%)14301(Top 94%)14301(Top 635%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 84%
×21story building
+97ft-345ft

Overall

22432

Males

13385

M45-49

13385

5K→10K

3.1 - 6.2 mi

Top 87%
×5story building
+79ft-138ft

Overall

23102

Males

13693

M45-49

13693

10K→15K

6.2 - 9.3 mi

Top 84%
×3story building
+67ft-78ft

Overall

22432

Males

13385

M45-49

13385

15K→20K

9.3 - 12.4 mi

Top 83%
×5story building
+106ft-86ft

Overall

21985

Males

13175

M45-49

13175

20K→Half

12.4 - 13.1 mi

Top 85%
×2story building
+19ft-37ft

Overall

22586

Males

13446

M45-49

13446

Half→25K

13.1 - 15.5 mi

Top 89%
×4story building
+66ft-88ft

Overall

23637

Males

13865

M45-49

13865

25K→30K

15.5 - 18.6 mi

Top 93%
×9story building
+181ft-148ft

Overall

24723

Males

14291

M45-49

14291

30K→20M

18.6 - 20.0 mi

Top 94%
×5story building
+64ft-50ft

Overall

24925

Males

14339

M45-49

14339

20M→21M

20.0 - 21.0 mi

Top 97%
×8story building
+106ft-24ft

Overall

25767

Males

14752

M45-49

14752

21M→35K

21.0 - 21.8 mi

Top 98%
×7story building
+17ft-86ft

Overall

25965

Males

14822

M45-49

14822

35K→23M

21.8 - 23.0 mi

Top 97%
×5story building
+23ft-63ft

Overall

25759

Males

14708

M45-49

14708

23M→24M

23.0 - 24.0 mi

Top 95%
×6story building
+12ft-82ft

Overall

25198

Males

14391

M45-49

14391

24M→40K

24.0 - 24.9 mi

Top 97%
×1story
+6ft-20ft

Overall

25715

Males

14659

M45-49

14659

40K→25.2M

24.9 - 25.2 mi

Top 96%
×1story
+13ft-16ft

Overall

25602

Males

14603

M45-49

14603

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

24977

Males

14301

M45-49

14301

Passing Analysis

Category:
Athletes Passed
1248
Passed By
1883
Net Change
-635
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23792
5K → 10K41194+317#23792#23475
10K → 15K33027+303#23475#23172
15K → 20K34013+327#23172#22845
20K → Half2720+7#22845#22838
Half → 25K53220-167#22838#23005
25K → 30K21475-454#23005#23459
30K → 20M22147-125#23459#23584
20M → 21M5268-263#23584#23847
21M → 35K2147-145#23847#23992
35K → 23M6183-177#23992#24169
23M → 24M1078-68#24169#24237
24M → 40K3105-102#24237#24339
40K → 25.2M655-49#24339#24388
25.2M → Finish1251-39#24388#24427
TOTALS12481883-635
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing