Boston Marathon logo
BOSTON MARATHON 2023

Maurits Dalm

Bib: 897•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 4%
Gender (Male)
#0 / 15176
Top 7%
Masters (Masters Men)
#0 / 9891
Top 2%
Division (M40-44)
#0 / 2241
Top 5%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
18:30
Rank: #617
Start → 5K
18:30 | 5:57/mi
10K· 6.21 mi
37:10
Rank: #696 (-79)
5K → 10K
18:40 | 6:00/mi
15K· 9.32 mi
56:19
Rank: #816 (-120)
10K → 15K
19:09 | 6:10/mi
20K· 12.43 mi
1:15:49
Rank: #918 (-102)
15K → 20K
19:30 | 6:17/mi
Half· 13.11 mi
1:20:04
Rank: #935 (-17)
20K → Half
4:15 | 6:14/mi
25K· 15.53 mi
1:35:19
Rank: #968 (-33)
Half → 25K
15:15 | 6:17/mi
30K· 18.64 mi
1:55:27
Rank: #998 (-30)
25K → 30K
20:08 | 6:29/mi
20M
2:04:23
Rank: #1032 (-34)
30K → 20M
8:56 | 6:34/mi
21M
2:11:30
Rank: #1070 (-38)
20M → 21M
7:07 | 7:07/mi
35K· 21.75 mi
2:16:13
Rank: #1072 (-2)
21M → 35K
4:43 | 6:18/mi
23M
2:24:29
Rank: #1093 (-21)
35K → 23M
8:16 | 6:36/mi
24M
2:30:58
Rank: #1120 (-27)
23M → 24M
6:29 | 6:29/mi
40K· 24.85 mi
2:36:39
Rank: #1135 (-15)
24M → 40K
5:41 | 6:39/mi
25.2M
2:39:08
Rank: #1141 (-6)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
2:45:37
Rank: #1153 (-12)
25.2M → Finish
6:29 | 6:22/mi

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
Time1:20:04
Pace6:06 /mi
2nd Half
Distance13.11 mi
Time1:25:33
Pace6:32 /mi
📊Positive Split: 6.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:18:3918:305:5718:30
5:57
-
10K
6.21 mi10:37:1937:105:5918:40
6:00
+0:03
15K
9.32 mi10:56:2856:196:0319:09
6:10
+0:10
20K
12.43 mi11:15:581:15:496:0619:30
6:17
+0:07
Half
13.11 mi11:20:131:20:046:064:15
6:14
-0:03
25K
15.53 mi11:35:281:35:196:0815:15
6:17
+0:03
30K
18.64 mi11:55:361:55:276:1220:08
6:29
+0:12
20M
20.00 mi12:04:322:04:236:138:56
6:34
+0:05
21M
21.00 mi12:11:392:11:306:167:07
7:07
+0:33
35K
21.75 mi12:16:222:16:136:164:43
6:18
-0:49
23M
23.00 mi12:24:382:24:296:178:16
6:36
+0:18
24M
24.00 mi12:31:072:30:586:176:29
6:29
-0:07
40K
24.85 mi12:36:482:36:396:185:41
6:39
+0:10
25.2M
25.20 mi12:39:172:39:086:192:29
7:12
+0:33
Finish
26.22 mi12:45:462:45:376:196:29
6:22
-0:50

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

5:57 /mi

Average Pace

6:19 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

56:19

34% of race

Time at Steady Pace

1:16:49

46% of race

Time at Slower Pace

32:29

20% of race

Average Pace: 6:19 /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 mi10:18:3918:305:5718:30
5:57
#617
10K
6.21 mi10:37:1937:105:5918:40
6:00
#696
15K
9.32 mi10:56:2856:196:0319:09
6:10
#816
20K
12.43 mi11:15:581:15:496:0619:30
6:17
#918
Half
13.11 mi11:20:131:20:046:064:15
6:14
#935
25K
15.53 mi11:35:281:35:196:0815:15
6:17
#968
30K
18.64 mi11:55:361:55:276:1220:08
6:29
#998
20M
20.00 mi12:04:322:04:236:138:56
6:34
#1032
21M
21.00 mi12:11:392:11:306:167:07
7:07
#1070
35K
21.75 mi12:16:222:16:136:164:43
6:18
#1072
23M
23.00 mi12:24:382:24:296:178:16
6:36
#1093
24M
24.00 mi12:31:072:30:586:176:29
6:29
#1120
40K
24.85 mi12:36:482:36:396:185:41
6:39
#1135
25.2M
25.20 mi12:39:172:39:086:192:29
7:12
#1141
Finish
26.22 mi12:45:462:45:376:196:29
6:22
#1153
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi6175735731135(Top 4%)1082(Top 7%)1082(Top 48%)
10K6.21 mi3.10 mi696-79652-79652-79818(Top 3%)772(Top 5%)772(Top 34%)
15K9.32 mi3.11 mi816-120769-117769-1171135(Top 4%)1082(Top 7%)1082(Top 48%)
20K12.43 mi3.11 mi918-102869-100869-1001300(Top 5%)1241(Top 8%)1241(Top 55%)
Half13.11 mi0.68 mi935-17886-17886-171455(Top 5%)1391(Top 9%)1391(Top 62%)
25K15.53 mi2.42 mi968-33919-33919-331291(Top 5%)1234(Top 8%)1234(Top 55%)
30K18.64 mi3.11 mi998-30948-29948-291489(Top 6%)1425(Top 9%)1425(Top 64%)
20M20.00 mi1.36 mi1032-34981-33981-331712(Top 6%)1632(Top 11%)1632(Top 73%)
21M21.00 mi1.00 mi1070-381018-371018-372658(Top 10%)2494(Top 16%)2494(Top 111%)
35K21.75 mi0.75 mi1072-21020-21020-21564(Top 6%)1484(Top 10%)1484(Top 66%)
23M23.00 mi1.25 mi1093-211041-211041-211759(Top 7%)1668(Top 11%)1668(Top 74%)
24M24.00 mi1.00 mi1120-271068-271068-272000(Top 8%)1875(Top 12%)1875(Top 84%)
40K24.85 mi0.85 mi1135-151082-141082-142075(Top 8%)1939(Top 13%)1939(Top 87%)
25.2M25.20 mi0.35 mi1141-61087-51087-52444(Top 9%)2257(Top 15%)2257(Top 101%)
Finish26.22 mi1.02 mi1153-121099-121099-121847(Top 7%)1725(Top 11%)1725(Top 77%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 4%
×21stories
+97ft-345ft

Overall

1135

Males

1082

M40-44

1082

5K→10K

3.1 - 6.2 mi

Top 3%
×5stories
+79ft-138ft

Overall

818

Males

772

M40-44

772

10K→15K

6.2 - 9.3 mi

Top 4%
×3stories
+67ft-78ft

Overall

1135

Males

1082

M40-44

1082

15K→20K

9.3 - 12.4 mi

Top 5%
×5stories
+106ft-86ft

Overall

1300

Males

1241

M40-44

1241

20K→Half

12.4 - 13.1 mi

Top 5%
×2stories
+19ft-37ft

Overall

1455

Males

1391

M40-44

1391

Half→25K

13.1 - 15.5 mi

Top 5%
×4stories
+66ft-88ft

Overall

1291

Males

1234

M40-44

1234

25K→30K

15.5 - 18.6 mi

Top 6%
×9stories
+181ft-148ft

Overall

1489

Males

1425

M40-44

1425

30K→20M

18.6 - 20.0 mi

Top 6%
×5stories
+64ft-50ft

Overall

1712

Males

1632

M40-44

1632

20M→21M

20.0 - 21.0 mi

Top 10%
×8stories
+106ft-24ft

Overall

2658

Males

2494

M40-44

2494

21M→35K

21.0 - 21.8 mi

Top 6%
×7stories
+17ft-86ft

Overall

1564

Males

1484

M40-44

1484

35K→23M

21.8 - 23.0 mi

Top 7%
×5stories
+23ft-63ft

Overall

1759

Males

1668

M40-44

1668

23M→24M

23.0 - 24.0 mi

Top 8%
×6stories
+12ft-82ft

Overall

2000

Males

1875

M40-44

1875

24M→40K

24.0 - 24.9 mi

Top 8%
×1story
+6ft-20ft

Overall

2075

Males

1939

M40-44

1939

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2444

Males

2257

M40-44

2257

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

1847

Males

1725

M40-44

1725

Passing Analysis

Category:
Athletes Passed
127
Passed By
663
Net Change
-536
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#617
5K → 10K584-79#617#696
10K → 15K2122-120#696#816
15K → 20K5107-102#816#918
20K → Half219-17#918#935
Half → 25K1043-33#935#968
25K → 30K2959-30#968#998
30K → 20M943-34#998#1032
20M → 21M947-38#1032#1070
21M → 35K810-2#1070#1072
35K → 23M1334-21#1072#1093
23M → 24M431-27#1093#1120
24M → 40K924-15#1120#1135
40K → 25.2M612-6#1135#1141
25.2M → Finish1628-12#1141#1153
TOTALS127663-536
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing