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BOSTON MARATHON 2023

Bas Tomassen

Bib: 30410•M

0:00
0:00
/ mi
Masters
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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
10:36/mi
32:55
↑ 97↓ 3451.5%
10K· 6.21 mi
10:27/mi
1:05:23
↑ 79↓ 1380.4%
15K· 9.32 mi
10:31/mi
1:38:04
↑ 67↓ 78
20K· 12.43 mi
10:39/mi
2:11:11
↑ 106↓ 860.1%
Half· 13.11 mi
10:39/mi
2:18:27
↑ 19↓ 370.5%
25K· 15.53 mi
11:01/mi
2:45:09
↑ 66↓ 880.2%
30K· 18.64 mi
11:34/mi
3:21:04
↑ 181↓ 1480.2%
20M
11:46/mi
3:37:03
↑ 64↓ 500.2%
21M
13:19/mi
3:50:22
↑ 106↓ 241.6%
35K· 21.75 mi
10:55/mi
3:58:32
↑ 17↓ 861.7%
23M
12:16/mi
4:13:53
↑ 23↓ 630.6%
24M
11:38/mi
4:25:31
↓ 821.3%
40K· 24.85 mi
13:02/mi
4:36:39
↓ 200.3%
25.2M
13:02/mi
4:41:09
↑ 13↓ 160.2%
Finish· 26.22 mi
11:40/mi
4:53:02
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:18:27
Pace10:34 /mi
2nd Half
Distance13.11 mi
Time2:34:35
Pace11:48 /mi
📊Positive Split: 11.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:51:1932:5510:3632:55
10:36
-
10K
6.21 mi12:23:471:05:2310:3132:28
10:27
-0:09
15K
9.32 mi12:56:281:38:0410:3132:41
10:31
+0:04
20K
12.43 mi13:29:352:11:1110:3333:07
10:39
+0:08
Half
13.11 mi13:36:512:18:2710:347:16
10:39
0:00
25K
15.53 mi14:03:332:45:0910:3826:42
11:01
+0:22
30K
18.64 mi14:39:283:21:0410:4735:55
11:34
+0:33
20M
20.00 mi14:55:273:37:0310:5115:59
11:46
+0:12
21M
21.00 mi15:08:463:50:2210:5813:19
13:19
+1:33
35K
21.75 mi15:16:563:58:3210:588:10
10:55
-2:24
23M
23.00 mi15:32:174:13:5311:0215:21
12:16
+1:21
24M
24.00 mi15:43:554:25:3111:0411:38
11:38
-0:38
40K
24.85 mi15:55:034:36:3911:0811:08
13:02
+1:24
25.2M
25.20 mi15:59:334:41:0911:094:30
13:02
0:00
Finish
26.22 mi16:11:264:53:0211:1111:53
11:40
-1:22

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

10:27 /mi

Average Pace

11:11 /mi

Slowest Pace

13:19 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:53:19

59% of race

Time at Steady Pace

1:15:25

26% of race

Time at Slower Pace

44:18

15% of race

Average Pace: 11:11 /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 mi11:51:1932:5510:3632:55
10:36
#24941
10K
6.21 mi12:23:471:05:2310:3132:28
10:27
#24748
15K
9.32 mi12:56:281:38:0410:3132:41
10:31
#24664
20K
12.43 mi13:29:352:11:1110:3333:07
10:39
#24514
Half
13.11 mi13:36:512:18:2710:347:16
10:39
#24508
25K
15.53 mi14:03:332:45:0910:3826:42
11:01
#24414
30K
18.64 mi14:39:283:21:0410:4735:55
11:34
#24329
20M
20.00 mi14:55:273:37:0310:5115:59
11:46
#24284
21M
21.00 mi15:08:463:50:2210:5813:19
13:19
#24300
35K
21.75 mi15:16:563:58:3210:588:10
10:55
#24259
23M
23.00 mi15:32:174:13:5311:0215:21
12:16
#24287
24M
24.00 mi15:43:554:25:3111:0411:38
11:38
#24289
40K
24.85 mi15:55:034:36:3911:0811:08
13:02
#24333
25.2M
25.20 mi15:59:334:41:0911:094:30
13:02
#24334
Finish
26.22 mi16:11:264:53:0211:1111:53
11:40
#24383
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM50-54Seg. OverallSeg. MalesSeg. M50-54
5K3.11 mi3.11 mi24941145131451324492(Top 92%)14293(Top 94%)14293(Top 697%)
10K6.21 mi3.10 mi24748+19314432+8114432+8124592(Top 92%)14350(Top 95%)14350(Top 699%)
15K9.32 mi3.11 mi24664+8414385+4714385+4724492(Top 92%)14293(Top 94%)14293(Top 697%)
20K12.43 mi3.11 mi24514+15014309+7614309+7624108(Top 91%)14111(Top 93%)14111(Top 688%)
Half13.11 mi0.68 mi24508+614300+914300+924492(Top 92%)14259(Top 94%)14259(Top 695%)
25K15.53 mi2.42 mi24414+9414252+4814252+4824000(Top 90%)14024(Top 92%)14024(Top 683%)
30K18.64 mi3.11 mi24329+8514195+5714195+5723944(Top 90%)13939(Top 92%)13939(Top 679%)
20M20.00 mi1.36 mi24284+4514165+3014165+3023896(Top 90%)13852(Top 91%)13852(Top 675%)
21M21.00 mi1.00 mi24300-1614166-114166-124410(Top 92%)14091(Top 93%)14091(Top 687%)
35K21.75 mi0.75 mi24259+4114135+3114135+3123152(Top 87%)13461(Top 89%)13461(Top 656%)
23M23.00 mi1.25 mi24287-2814143-814143-824312(Top 91%)13997(Top 92%)13997(Top 682%)
24M24.00 mi1.00 mi24289-214140+314140+324052(Top 90%)13846(Top 91%)13846(Top 675%)
40K24.85 mi0.85 mi24333-4414156-1614156-1624964(Top 94%)14281(Top 94%)14281(Top 696%)
25.2M25.20 mi0.35 mi24334-114150+614150+624002(Top 90%)13788(Top 91%)13788(Top 672%)
Finish26.22 mi1.02 mi24383-4914168-1814168-1824892(Top 94%)14264(Top 94%)14264(Top 695%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 92%
×21story building
+97ft-345ft

Overall

24492

Males

14293

M50-54

14293

5K→10K

3.1 - 6.2 mi

Top 92%
×5story building
+79ft-138ft

Overall

24592

Males

14350

M50-54

14350

10K→15K

6.2 - 9.3 mi

Top 92%
×3story building
+67ft-78ft

Overall

24492

Males

14293

M50-54

14293

15K→20K

9.3 - 12.4 mi

Top 91%
×5story building
+106ft-86ft

Overall

24108

Males

14111

M50-54

14111

20K→Half

12.4 - 13.1 mi

Top 92%
×2story building
+19ft-37ft

Overall

24492

Males

14259

M50-54

14259

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

24000

Males

14024

M50-54

14024

25K→30K

15.5 - 18.6 mi

Top 90%
×9story building
+181ft-148ft

Overall

23944

Males

13939

M50-54

13939

30K→20M

18.6 - 20.0 mi

Top 90%
×5story building
+64ft-50ft

Overall

23896

Males

13852

M50-54

13852

20M→21M

20.0 - 21.0 mi

Top 92%
×8story building
+106ft-24ft

Overall

24410

Males

14091

M50-54

14091

21M→35K

21.0 - 21.8 mi

Top 87%
×7story building
+17ft-86ft

Overall

23152

Males

13461

M50-54

13461

35K→23M

21.8 - 23.0 mi

Top 91%
×5story building
+23ft-63ft

Overall

24312

Males

13997

M50-54

13997

23M→24M

23.0 - 24.0 mi

Top 90%
×6story building
+12ft-82ft

Overall

24052

Males

13846

M50-54

13846

24M→40K

24.0 - 24.9 mi

Top 94%
×1story
+6ft-20ft

Overall

24964

Males

14281

M50-54

14281

40K→25.2M

24.9 - 25.2 mi

Top 90%
×1story
+13ft-16ft

Overall

24002

Males

13788

M50-54

13788

25.2M→Finish

25.2 - 26.2 mi

Top 94%
×2story building
+22ft-21ft

Overall

24892

Males

14264

M50-54

14264

Passing Analysis

Category:
Athletes Passed
1177
Passed By
619
Net Change
+558
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24941
5K → 10K302109+193#24941#24748
10K → 15K14864+84#24748#24664
15K → 20K17929+150#24664#24514
20K → Half2620+6#24514#24508
Half → 25K13440+94#24508#24414
25K → 30K15671+85#24414#24329
30K → 20M7429+45#24329#24284
20M → 21M3046-16#24284#24300
21M → 35K498+41#24300#24259
35K → 23M2250-28#24259#24287
23M → 24M2325-2#24287#24289
24M → 40K852-44#24289#24333
40K → 25.2M1516-1#24333#24334
25.2M → Finish1160-49#24334#24383
TOTALS1177619+558
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing