Boston Marathon logo
BOSTON MARATHON 2023

Xaver Tomaszewski

Bib: 6373•M

MI

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 11%
Gender (Male)
#0 / 15176
Top 18%
Masters (Masters Men)
#0 / 9891
Top 7%
Division (M45-49)
#0 / 2252
Top 7%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:46
Rank: #3505
Start → 5K
6:41/mi
20:46 split
10K· 6.21 mi
41:24
Rank: #3632 (-127)
5K → 10K
6:38/mi
20:38 split
15K· 9.32 mi
1:01:56
Rank: #3511 (+121)
10K → 15K
6:37/mi
20:32 split
20K· 12.43 mi
1:22:40
Rank: #3458 (+53)
15K → 20K
6:40/mi
20:44 split
Half· 13.11 mi
1:27:12
Rank: #3472 (-14)
20K → Half
6:39/mi
4:32 split
25K· 15.53 mi
1:43:27
Rank: #3417 (+55)
Half → 25K
6:42/mi
16:15 split
30K· 18.64 mi
2:04:32
Rank: #3286 (+131)
25K → 30K
6:47/mi
21:05 split
20M
2:13:41
Rank: #3178 (+108)
30K → 20M
6:44/mi
9:09 split
21M
2:20:47
Rank: #3118 (+60)
20M → 21M
7:06/mi
7:06 split
35K· 21.75 mi
2:25:40
Rank: #3074 (+44)
21M → 35K
6:32/mi
4:53 split
23M
2:34:10
Rank: #3018 (+56)
35K → 23M
6:47/mi
8:30 split
24M
2:40:43
Rank: #2951 (+67)
23M → 24M
6:33/mi
6:33 split
40K· 24.85 mi
2:46:27
Rank: #2900 (+51)
24M → 40K
6:42/mi
5:44 split
25.2M
2:48:55
Rank: #2867 (+33)
40K → 25.2M
7:09/mi
2:28 split
Finish· 26.22 mi
2:55:33
Rank: #2836 (+31)
25.2M → Finish
6:31/mi
6:38 split

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
Time1:27:12
Pace6:39 /mi
2nd Half
Distance13.11 mi
Time1:28:21
Pace6:44 /mi
📊Positive Split: 1.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:1020:466:4120:46
6:41
-
10K
6.21 mi10:44:4841:246:4020:38
6:38
-0:03
15K
9.32 mi11:05:201:01:566:3920:32
6:37
-0:01
20K
12.43 mi11:26:041:22:406:3920:44
6:40
+0:03
Half
13.11 mi11:30:361:27:126:394:32
6:39
-0:01
25K
15.53 mi11:46:511:43:276:4016:15
6:42
+0:03
30K
18.64 mi12:07:562:04:326:4121:05
6:47
+0:05
20M
20.00 mi12:17:052:13:416:419:09
6:44
-0:03
21M
21.00 mi12:24:112:20:476:427:06
7:06
+0:22
35K
21.75 mi12:29:042:25:406:424:53
6:32
-0:34
23M
23.00 mi12:37:342:34:106:428:30
6:47
+0:15
24M
24.00 mi12:44:072:40:436:426:33
6:33
-0:14
40K
24.85 mi12:49:512:46:276:425:44
6:42
+0:09
25.2M
25.20 mi12:52:192:48:556:422:28
7:09
+0:27
Finish
26.22 mi12:58:572:55:336:426:38
6:31
-0:38

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

6:31 /mi

Average Pace

6:42 /mi

Slowest Pace

7:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:45:59

95% of race

Time at Steady Pace

9:34

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:42 /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 mi10:24:1020:466:4120:46
6:41
#3505
10K
6.21 mi10:44:4841:246:4020:38
6:38
#3632
15K
9.32 mi11:05:201:01:566:3920:32
6:37
#3511
20K
12.43 mi11:26:041:22:406:3920:44
6:40
#3458
Half
13.11 mi11:30:361:27:126:394:32
6:39
#3472
25K
15.53 mi11:46:511:43:276:4016:15
6:42
#3417
30K
18.64 mi12:07:562:04:326:4121:05
6:47
#3286
20M
20.00 mi12:17:052:13:416:419:09
6:44
#3178
21M
21.00 mi12:24:112:20:476:427:06
7:06
#3118
35K
21.75 mi12:29:042:25:406:424:53
6:32
#3074
23M
23.00 mi12:37:342:34:106:428:30
6:47
#3018
24M
24.00 mi12:44:072:40:436:426:33
6:33
#2951
40K
24.85 mi12:49:512:46:276:425:44
6:42
#2900
25.2M
25.20 mi12:52:192:48:556:422:28
7:09
#2867
Finish
26.22 mi12:58:572:55:336:426:38
6:31
#2836
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi3505330333033348(Top 13%)3177(Top 21%)3177(Top 141%)
10K6.21 mi3.10 mi3632-1273426-1233426-1233792(Top 14%)3576(Top 24%)3576(Top 159%)
15K9.32 mi3.11 mi3511+1213323+1033323+1033348(Top 13%)3177(Top 21%)3177(Top 141%)
20K12.43 mi3.11 mi3458+533277+463277+463353(Top 13%)3181(Top 21%)3181(Top 141%)
Half13.11 mi0.68 mi3472-143288-113288-113727(Top 14%)3511(Top 23%)3511(Top 156%)
25K15.53 mi2.42 mi3417+553246+423246+423354(Top 13%)3181(Top 21%)3181(Top 141%)
30K18.64 mi3.11 mi3286+1313123+1233123+1232886(Top 11%)2736(Top 18%)2736(Top 121%)
20M20.00 mi1.36 mi3178+1083020+1033020+1032446(Top 9%)2321(Top 15%)2321(Top 103%)
21M21.00 mi1.00 mi3118+602961+592961+592626(Top 10%)2472(Top 16%)2472(Top 110%)
35K21.75 mi0.75 mi3074+442919+422919+422569(Top 10%)2428(Top 16%)2428(Top 108%)
23M23.00 mi1.25 mi3018+562868+512868+512591(Top 10%)2432(Top 16%)2432(Top 108%)
24M24.00 mi1.00 mi2951+672805+632805+632312(Top 9%)2163(Top 14%)2163(Top 96%)
40K24.85 mi0.85 mi2900+512756+492756+492368(Top 9%)2198(Top 14%)2198(Top 98%)
25.2M25.20 mi0.35 mi2867+332724+322724+322311(Top 9%)2144(Top 14%)2144(Top 95%)
Finish26.22 mi1.02 mi2836+312691+332691+332523(Top 9%)2317(Top 15%)2317(Top 103%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 13%
×21story building
+97ft-345ft

Overall

3348

Males

3177

M45-49

3177

5K→10K

3.1 - 6.2 mi

Top 14%
×5story building
+79ft-138ft

Overall

3792

Males

3576

M45-49

3576

10K→15K

6.2 - 9.3 mi

Top 13%
×3story building
+67ft-78ft

Overall

3348

Males

3177

M45-49

3177

15K→20K

9.3 - 12.4 mi

Top 13%
×5story building
+106ft-86ft

Overall

3353

Males

3181

M45-49

3181

20K→Half

12.4 - 13.1 mi

Top 14%
×2story building
+19ft-37ft

Overall

3727

Males

3511

M45-49

3511

Half→25K

13.1 - 15.5 mi

Top 13%
×4story building
+66ft-88ft

Overall

3354

Males

3181

M45-49

3181

25K→30K

15.5 - 18.6 mi

Top 11%
×9story building
+181ft-148ft

Overall

2886

Males

2736

M45-49

2736

30K→20M

18.6 - 20.0 mi

Top 9%
×5story building
+64ft-50ft

Overall

2446

Males

2321

M45-49

2321

20M→21M

20.0 - 21.0 mi

Top 10%
×8story building
+106ft-24ft

Overall

2626

Males

2472

M45-49

2472

21M→35K

21.0 - 21.8 mi

Top 10%
×7story building
+17ft-86ft

Overall

2569

Males

2428

M45-49

2428

35K→23M

21.8 - 23.0 mi

Top 10%
×5story building
+23ft-63ft

Overall

2591

Males

2432

M45-49

2432

23M→24M

23.0 - 24.0 mi

Top 9%
×6story building
+12ft-82ft

Overall

2312

Males

2163

M45-49

2163

24M→40K

24.0 - 24.9 mi

Top 9%
×1story
+6ft-20ft

Overall

2368

Males

2198

M45-49

2198

40K→25.2M

24.9 - 25.2 mi

Top 9%
×1story
+13ft-16ft

Overall

2311

Males

2144

M45-49

2144

25.2M→Finish

25.2 - 26.2 mi

Top 9%
×2story building
+22ft-21ft

Overall

2523

Males

2317

M45-49

2317

Passing Analysis

Category:
Athletes Passed
1246
Passed By
577
Net Change
+669
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3505
5K → 10K145272-127#3505#3632
10K → 15K16847+121#3632#3511
15K → 20K10451+53#3511#3458
20K → Half1327-14#3458#3472
Half → 25K9035+55#3472#3417
25K → 30K16231+131#3417#3286
30K → 20M12517+108#3286#3178
20M → 21M7313+60#3178#3118
21M → 35K506+44#3118#3074
35K → 23M7822+56#3074#3018
23M → 24M7912+67#3018#2951
24M → 40K6514+51#2951#2900
40K → 25.2M385+33#2900#2867
25.2M → Finish5625+31#2867#2836
TOTALS1246577+669
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing