Boston Marathon logo
BOSTON MARATHON 2023

Daniel Vandersteen

Bib: 10477•M

NJ

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 31%
Gender (Male)
#0 / 15176
Top 46%
Masters (Masters Men)
#0 / 9891
Top 34%
Division (M50-54)
#0 / 2052
Top 30%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:32
Rank: #7808
Start → 5K
22:32 | 7:15/mi
10K· 6.21 mi
45:11
Rank: #8261 (-453)
5K → 10K
22:39 | 7:17/mi
15K· 9.32 mi
1:08:09
Rank: #8543 (-282)
10K → 15K
22:58 | 7:24/mi
20K· 12.43 mi
1:31:30
Rank: #8717 (-174)
15K → 20K
23:21 | 7:31/mi
Half· 13.11 mi
1:36:31
Rank: #8720 (-3)
20K → Half
5:01 | 7:21/mi
25K· 15.53 mi
1:54:44
Rank: #8722 (-2)
Half → 25K
18:13 | 7:31/mi
30K· 18.64 mi
2:18:55
Rank: #8766 (-44)
25K → 30K
24:11 | 7:47/mi
20M
2:29:32
Rank: #8767 (-1)
30K → 20M
10:37 | 7:49/mi
21M
2:37:49
Rank: #8756 (+11)
20M → 21M
8:17 | 8:17/mi
35K· 21.75 mi
2:43:17
Rank: #8693 (+63)
21M → 35K
5:28 | 7:18/mi
23M
2:52:55
Rank: #8605 (+88)
35K → 23M
9:38 | 7:42/mi
24M
3:00:15
Rank: #8474 (+131)
23M → 24M
7:20 | 7:20/mi
40K· 24.85 mi
3:06:38
Rank: #8379 (+95)
24M → 40K
6:23 | 7:28/mi
25.2M
3:09:31
Rank: #8366 (+13)
40K → 25.2M
2:53 | 8:22/mi
Finish· 26.22 mi
3:17:11
Rank: #8358 (+8)
25.2M → Finish
7:40 | 7:31/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
Time1:36:31
Pace7:22 /mi
2nd Half
Distance13.11 mi
Time1:40:40
Pace7:41 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:2722:327:1522:32
7:15
-
10K
6.21 mi11:18:0645:117:1622:39
7:17
+0:02
15K
9.32 mi11:41:041:08:097:1922:58
7:24
+0:07
20K
12.43 mi12:04:251:31:307:2223:21
7:31
+0:07
Half
13.11 mi12:09:261:36:317:225:01
7:21
-0:10
25K
15.53 mi12:27:391:54:447:2318:13
7:31
+0:10
30K
18.64 mi12:51:502:18:557:2724:11
7:47
+0:16
20M
20.00 mi13:02:272:29:327:2910:37
7:49
+0:02
21M
21.00 mi13:10:442:37:497:318:17
8:17
+0:28
35K
21.75 mi13:16:122:43:177:305:28
7:18
-0:59
23M
23.00 mi13:25:502:52:557:319:38
7:42
+0:24
24M
24.00 mi13:33:103:00:157:317:20
7:20
-0:22
40K
24.85 mi13:39:333:06:387:316:23
7:28
+0:08
25.2M
25.20 mi13:42:263:09:317:312:53
8:22
+0:54
Finish
26.22 mi13:50:063:17:117:327:40
7:31
-0:51

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

7:15 /mi

Average Pace

7:32 /mi

Slowest Pace

8:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:06:01

94% of race

Time at Steady Pace

11:10

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi10:55:2722:327:1522:32
7:15
#7808
10K
6.21 mi11:18:0645:117:1622:39
7:17
#8261
15K
9.32 mi11:41:041:08:097:1922:58
7:24
#8543
20K
12.43 mi12:04:251:31:307:2223:21
7:31
#8717
Half
13.11 mi12:09:261:36:317:225:01
7:21
#8720
25K
15.53 mi12:27:391:54:447:2318:13
7:31
#8722
30K
18.64 mi12:51:502:18:557:2724:11
7:47
#8766
20M
20.00 mi13:02:272:29:327:2910:37
7:49
#8767
21M
21.00 mi13:10:442:37:497:318:17
8:17
#8756
35K
21.75 mi13:16:122:43:177:305:28
7:18
#8693
23M
23.00 mi13:25:502:52:557:319:38
7:42
#8605
24M
24.00 mi13:33:103:00:157:317:20
7:20
#8474
40K
24.85 mi13:39:333:06:387:316:23
7:28
#8379
25.2M
25.20 mi13:42:263:09:317:312:53
8:22
#8366
Finish
26.22 mi13:50:063:17:117:327:40
7:31
#8358
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi7808684568459251(Top 35%)7699(Top 51%)7699(Top 375%)
10K6.21 mi3.10 mi8261-4537126-2817126-2818793(Top 33%)7448(Top 49%)7448(Top 363%)
15K9.32 mi3.11 mi8543-2827296-1707296-1709251(Top 35%)7699(Top 51%)7699(Top 375%)
20K12.43 mi3.11 mi8717-1747386-907386-909422(Top 35%)7748(Top 51%)7748(Top 378%)
Half13.11 mi0.68 mi8720-37381+57381+58971(Top 34%)7487(Top 49%)7487(Top 365%)
25K15.53 mi2.42 mi8722-27370+117370+118860(Top 33%)7340(Top 48%)7340(Top 358%)
30K18.64 mi3.11 mi8766-447362+87362+89216(Top 35%)7399(Top 49%)7399(Top 361%)
20M20.00 mi1.36 mi8767-17343+197343+198933(Top 34%)7147(Top 47%)7147(Top 348%)
21M21.00 mi1.00 mi8756+117318+257318+259108(Top 34%)7123(Top 47%)7123(Top 347%)
35K21.75 mi0.75 mi8693+637261+577261+577168(Top 27%)6008(Top 40%)6008(Top 293%)
23M23.00 mi1.25 mi8605+887184+777184+777680(Top 29%)6230(Top 41%)6230(Top 304%)
24M24.00 mi1.00 mi8474+1317082+1027082+1026606(Top 25%)5496(Top 36%)5496(Top 268%)
40K24.85 mi0.85 mi8379+957001+817001+816497(Top 24%)5343(Top 35%)5343(Top 260%)
25.2M25.20 mi0.35 mi8366+136983+186983+188615(Top 32%)6516(Top 43%)6516(Top 318%)
Finish26.22 mi1.02 mi8358+86956+276956+278700(Top 33%)6578(Top 43%)6578(Top 321%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9251

Males

7699

M50-54

7699

5K→10K

3.1 - 6.2 mi

Top 33%
×5stories
+79ft-138ft

Overall

8793

Males

7448

M50-54

7448

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9251

Males

7699

M50-54

7699

15K→20K

9.3 - 12.4 mi

Top 35%
×5stories
+106ft-86ft

Overall

9422

Males

7748

M50-54

7748

20K→Half

12.4 - 13.1 mi

Top 34%
×2stories
+19ft-37ft

Overall

8971

Males

7487

M50-54

7487

Half→25K

13.1 - 15.5 mi

Top 33%
×4stories
+66ft-88ft

Overall

8860

Males

7340

M50-54

7340

25K→30K

15.5 - 18.6 mi

Top 35%
×9stories
+181ft-148ft

Overall

9216

Males

7399

M50-54

7399

30K→20M

18.6 - 20.0 mi

Top 34%
×5stories
+64ft-50ft

Overall

8933

Males

7147

M50-54

7147

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

9108

Males

7123

M50-54

7123

21M→35K

21.0 - 21.8 mi

Top 27%
×7stories
+17ft-86ft

Overall

7168

Males

6008

M50-54

6008

35K→23M

21.8 - 23.0 mi

Top 29%
×5stories
+23ft-63ft

Overall

7680

Males

6230

M50-54

6230

23M→24M

23.0 - 24.0 mi

Top 25%
×6stories
+12ft-82ft

Overall

6606

Males

5496

M50-54

5496

24M→40K

24.0 - 24.9 mi

Top 24%
×1story
+6ft-20ft

Overall

6497

Males

5343

M50-54

5343

40K→25.2M

24.9 - 25.2 mi

Top 32%
×1story
+13ft-16ft

Overall

8615

Males

6516

M50-54

6516

25.2M→Finish

25.2 - 26.2 mi

Top 33%
×2stories
+22ft-21ft

Overall

8700

Males

6578

M50-54

6578

Passing Analysis

Category:
Athletes Passed
1198
Passed By
1748
Net Change
-550
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#7808
5K → 10K69522-453#7808#8261
10K → 15K58340-282#8261#8543
15K → 20K76250-174#8543#8717
20K → Half2225-3#8717#8720
Half → 25K103105-2#8720#8722
25K → 30K151195-44#8722#8766
30K → 20M7778-1#8766#8767
20M → 21M8978+11#8767#8756
21M → 35K7310+63#8756#8693
35K → 23M12133+88#8693#8605
23M → 24M14110+131#8605#8474
24M → 40K11015+95#8474#8379
40K → 25.2M3421+13#8379#8366
25.2M → Finish7466+8#8366#8358
TOTALS11981748-550
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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