Boston Marathon logo
BOSTON MARATHON 2023

Dimitrios Kalofonos

Bib: 26021•M

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M50-54)
#0 / 2052
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
13:18/mi
41:18
↑ 97↓ 3451.5%
10K· 6.21 mi
13:19/mi
1:22:39
↑ 79↓ 1380.4%
15K· 9.32 mi
13:12/mi
2:03:40
↑ 67↓ 78
20K· 12.43 mi
13:12/mi
2:44:42
↑ 106↓ 860.1%
Half· 13.11 mi
13:13/mi
2:53:43
↑ 19↓ 370.5%
25K· 15.53 mi
13:58/mi
3:27:34
↑ 66↓ 880.2%
30K· 18.64 mi
14:24/mi
4:12:18
↑ 181↓ 1480.2%
20M
14:35/mi
4:32:07
↑ 64↓ 500.2%
21M
13:44/mi
4:45:51
↑ 106↓ 241.6%
35K· 21.75 mi
13:07/mi
4:55:40
↑ 17↓ 861.7%
23M
14:10/mi
5:13:24
↑ 23↓ 630.6%
24M
13:21/mi
5:26:45
↓ 821.3%
40K· 24.85 mi
12:57/mi
5:37:49
↓ 200.3%
25.2M
13:35/mi
5:42:30
↑ 13↓ 160.2%
Finish· 26.22 mi
12:04/mi
5:54:48
↑ 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
Time2:53:43
Pace13:15 /mi
2nd Half
Distance13.11 mi
Time3:01:05
Pace13:49 /mi
📊Positive Split: 4.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:57:5441:1813:1841:18
13:18
-
10K
6.21 mi12:39:151:22:3913:1841:21
13:19
+0:01
15K
9.32 mi13:20:162:03:4013:1641:01
13:12
-0:07
20K
12.43 mi14:01:182:44:4213:1541:02
13:12
0:00
Half
13.11 mi14:10:192:53:4313:159:01
13:13
+0:01
25K
15.53 mi14:44:103:27:3413:2233:51
13:58
+0:45
30K
18.64 mi15:28:544:12:1813:3244:44
14:24
+0:26
20M
20.00 mi15:48:434:32:0713:3619:49
14:35
+0:11
21M
21.00 mi16:02:274:45:5113:3713:44
13:44
-0:51
35K
21.75 mi16:12:164:55:4013:369:49
13:07
-0:37
23M
23.00 mi16:30:005:13:2413:3817:44
14:10
+1:03
24M
24.00 mi16:43:215:26:4513:3713:21
13:21
-0:49
40K
24.85 mi16:54:255:37:4913:3511:04
12:57
-0:24
25.2M
25.20 mi16:59:065:42:3013:354:41
13:35
+0:38
Finish
26.22 mi17:11:245:54:4813:3312:18
12:04
-1:31

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

12:04 /mi

Average Pace

13:33 /mi

Slowest Pace

14:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

23:22

7% of race

Time at Steady Pace

3:21:34

57% of race

Time at Slower Pace

2:09:52

37% of race

Average Pace: 13:32 /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 mi11:57:5441:1813:1841:18
13:18
#26604
10K
6.21 mi12:39:151:22:3913:1841:21
13:19
#26604
15K
9.32 mi13:20:162:03:4013:1641:01
13:12
#26598
20K
12.43 mi14:01:182:44:4213:1541:02
13:12
#26581
Half
13.11 mi14:10:192:53:4313:159:01
13:13
#26577
25K
15.53 mi14:44:103:27:3413:2233:51
13:58
#26577
30K
18.64 mi15:28:544:12:1813:3244:44
14:24
#26564
20M
20.00 mi15:48:434:32:0713:3619:49
14:35
#26558
21M
21.00 mi16:02:274:45:5113:3713:44
13:44
#26531
35K
21.75 mi16:12:164:55:4013:369:49
13:07
#26515
23M
23.00 mi16:30:005:13:2413:3817:44
14:10
#26511
24M
24.00 mi16:43:215:26:4513:3713:21
13:21
#26502
40K
24.85 mi16:54:255:37:4913:3511:04
12:57
#26471
25.2M
25.20 mi16:59:065:42:3013:354:41
13:35
#26464
Finish
26.22 mi17:11:245:54:4813:3312:18
12:04
#26437
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi26604151651516526532(Top 100%)15130(Top 100%)15130(Top 737%)
10K6.21 mi3.10 mi2660415166-115166-126585(Top 100%)15153(Top 100%)15153(Top 738%)
15K9.32 mi3.11 mi26598+615160+615160+626532(Top 100%)15130(Top 100%)15130(Top 737%)
20K12.43 mi3.11 mi26581+1715148+1215148+1226329(Top 99%)15052(Top 99%)15052(Top 734%)
Half13.11 mi0.68 mi26577+415146+215146+226408(Top 99%)15074(Top 99%)15074(Top 735%)
25K15.53 mi2.42 mi2657715148-215148-226332(Top 99%)15047(Top 99%)15047(Top 733%)
30K18.64 mi3.11 mi26564+1315142+615142+626201(Top 98%)14976(Top 99%)14976(Top 730%)
20M20.00 mi1.36 mi26558+615143-115143-126142(Top 98%)14919(Top 98%)14919(Top 727%)
21M21.00 mi1.00 mi26531+2715132+1115132+1124818(Top 93%)14281(Top 94%)14281(Top 696%)
35K21.75 mi0.75 mi26515+1615126+615126+625662(Top 96%)14661(Top 97%)14661(Top 714%)
23M23.00 mi1.25 mi26511+415125+115125+125930(Top 97%)14797(Top 98%)14797(Top 721%)
24M24.00 mi1.00 mi26502+915120+515120+525718(Top 97%)14658(Top 97%)14658(Top 714%)
40K24.85 mi0.85 mi26471+3115109+1115109+1124904(Top 94%)14254(Top 94%)14254(Top 695%)
25.2M25.20 mi0.35 mi26464+715105+415105+424631(Top 93%)14099(Top 93%)14099(Top 687%)
Finish26.22 mi1.02 mi26437+2715091+1415091+1425304(Top 95%)14461(Top 95%)14461(Top 705%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 100%
×21story building
+97ft-345ft

Overall

26532

Males

15130

M50-54

15130

5K→10K

3.1 - 6.2 mi

Top 100%
×5story building
+79ft-138ft

Overall

26585

Males

15153

M50-54

15153

10K→15K

6.2 - 9.3 mi

Top 100%
×3story building
+67ft-78ft

Overall

26532

Males

15130

M50-54

15130

15K→20K

9.3 - 12.4 mi

Top 99%
×5story building
+106ft-86ft

Overall

26329

Males

15052

M50-54

15052

20K→Half

12.4 - 13.1 mi

Top 99%
×2story building
+19ft-37ft

Overall

26408

Males

15074

M50-54

15074

Half→25K

13.1 - 15.5 mi

Top 99%
×4story building
+66ft-88ft

Overall

26332

Males

15047

M50-54

15047

25K→30K

15.5 - 18.6 mi

Top 98%
×9story building
+181ft-148ft

Overall

26201

Males

14976

M50-54

14976

30K→20M

18.6 - 20.0 mi

Top 98%
×5story building
+64ft-50ft

Overall

26142

Males

14919

M50-54

14919

20M→21M

20.0 - 21.0 mi

Top 93%
×8story building
+106ft-24ft

Overall

24818

Males

14281

M50-54

14281

21M→35K

21.0 - 21.8 mi

Top 96%
×7story building
+17ft-86ft

Overall

25662

Males

14661

M50-54

14661

35K→23M

21.8 - 23.0 mi

Top 97%
×5story building
+23ft-63ft

Overall

25930

Males

14797

M50-54

14797

23M→24M

23.0 - 24.0 mi

Top 97%
×6story building
+12ft-82ft

Overall

25718

Males

14658

M50-54

14658

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

24904

Males

14254

M50-54

14254

40K→25.2M

24.9 - 25.2 mi

Top 93%
×1story
+13ft-16ft

Overall

24631

Males

14099

M50-54

14099

25.2M→Finish

25.2 - 26.2 mi

Top 95%
×2story building
+22ft-21ft

Overall

25304

Males

14461

M50-54

14461

Passing Analysis

Category:
Athletes Passed
193
Passed By
26
Net Change
+167
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#26604
5K → 10K550#26604#26604
10K → 15K93+6#26604#26598
15K → 20K170+17#26598#26581
20K → Half40+4#26581#26577
Half → 25K550#26577#26577
25K → 30K185+13#26577#26564
30K → 20M104+6#26564#26558
20M → 21M270+27#26558#26531
21M → 35K160+16#26531#26515
35K → 23M51+4#26515#26511
23M → 24M101+9#26511#26502
24M → 40K332+31#26502#26471
40K → 25.2M70+7#26471#26464
25.2M → Finish270+27#26464#26437
TOTALS19326+167
📊

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