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BOSTON MARATHON 2026

Tom Groothaert

Bib: 5718•M

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Top 22%
Gender (Male)
#0 / 16340
Top 34%
Masters (Masters Men)
#0 / 10617
Top 20%
Age Group (M45-49)
#0 / 2413
Top 28%
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
20:06
3.11 mi
Rank: #3970
Start → 5K
20:06 | 6:29/mi
10K
40:30
6.21 mi
Rank: #4332 (-362)
5K → 10K
20:24 | 6:34/mi
15K
1:01:02
9.32 mi
Rank: #4571 (-239)
10K → 15K
20:32 | 6:37/mi
20K
1:21:43
12.43 mi
Rank: #4612 (-41)
15K → 20K
20:41 | 6:40/mi
HALF
1:26:17
13.11 mi
Rank: #4682 (-70)
20K → HALF
4:34 | 6:42/mi
25K
1:42:47
15.53 mi
Rank: #4790 (-108)
HALF → 25K
16:30 | 6:49/mi
30K
2:04:32
18.64 mi
Rank: #4915 (-125)
25K → 30K
21:45 | 7:01/mi
20M
2:14:12
20.00 mi
Rank: #5017 (-102)
30K → 20M
9:40 | 7:07/mi
21M
2:21:40
21.00 mi
Rank: #5078 (-61)
20M → 21M
7:28 | 7:28/mi
35K
2:26:58
21.75 mi
Rank: #5159 (-81)
21M → 35K
5:18 | 7:06/mi
23M
2:36:33
23.00 mi
Rank: #5473 (-314)
35K → 23M
9:35 | 7:40/mi
24M
2:44:00
24.00 mi
Rank: #5681 (-208)
23M → 24M
7:27 | 7:27/mi
40K
2:50:50
24.85 mi
Rank: #5976 (-295)
24M → 40K
6:50 | 8:00/mi
25.2M
2:53:51
25.20 mi
Rank: #6108 (-132)
40K → 25.2M
3:01 | 8:45/mi
FINISH
3:02:08
26.22 mi
Rank: #6385 (-277)
25.2M → FINISH
8:17 | 8:08/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:26:17
Pace6:35 /mi
2nd Half
Distance13.11 mi
Time1:35:51
Pace7:19 /mi
📊Positive Split: 11.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:2820:066:2920:06
6:29
-
10K
6.21 mi10:44:5240:306:3220:24
6:34
+0:05
15K
9.32 mi11:05:241:01:026:3320:32
6:37
+0:03
20K
12.43 mi11:26:051:21:436:3520:41
6:40
+0:03
HALF
13.11 mi11:30:391:26:176:354:34
6:42
+0:02
25K
15.53 mi11:47:091:42:476:3716:30
6:49
+0:07
30K
18.64 mi12:08:542:04:326:4121:45
7:01
+0:12
20M
20.00 mi12:18:342:14:126:439:40
7:07
+0:06
21M
21.00 mi12:26:022:21:406:457:28
7:28
+0:21
35K
21.75 mi12:31:202:26:586:465:18
7:06
-0:22
23M
23.00 mi12:40:552:36:336:499:35
7:40
+0:34
24M
24.00 mi12:48:222:44:006:517:27
7:27
-0:13
40K
24.85 mi12:55:122:50:506:536:50
8:00
+0:33
25.2M
25.20 mi12:58:132:53:516:543:01
8:45
+0:45
FINISH
26.22 mi13:06:303:02:086:588:17
8:08
-0:37

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

6:29 /mi

Average Pace

6:57 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

1:26:17

47% of race

Time at Steady Pace

53:13

29% of race

Time at Slower Pace

42:38

23% of race

Average Pace: 6:57 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:24:2820:066:2920:06
6:29
#3970
10K
6.21 mi10:44:5240:306:3220:24
6:34
#4332
15K
9.32 mi11:05:241:01:026:3320:32
6:37
#4571
20K
12.43 mi11:26:051:21:436:3520:41
6:40
#4612
HALF
13.11 mi11:30:391:26:176:354:34
6:42
#4682
25K
15.53 mi11:47:091:42:476:3716:30
6:49
#4790
30K
18.64 mi12:08:542:04:326:4121:45
7:01
#4915
20M
20.00 mi12:18:342:14:126:439:40
7:07
#5017
21M
21.00 mi12:26:022:21:406:457:28
7:28
#5078
35K
21.75 mi12:31:202:26:586:465:18
7:06
#5159
23M
23.00 mi12:40:552:36:336:499:35
7:40
#5473
24M
24.00 mi12:48:222:44:006:517:27
7:27
#5681
40K
24.85 mi12:55:122:50:506:536:50
8:00
#5976
25.2M
25.20 mi12:58:132:53:516:543:01
8:45
#6108
FINISH
26.22 mi13:06:303:02:086:588:17
8:08
#6385
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM45-49Seg. OverallSeg. MalesSeg. M45-49
5K3.11 mi3.11 mi3970377437745001(Top 17%)4659(Top 29%)4659(Top 193%)
10K6.21 mi3.10 mi4332-3624099-3254099-3254759(Top 16%)4466(Top 27%)4466(Top 185%)
15K9.32 mi3.11 mi4571-2394306-2074306-2075001(Top 17%)4659(Top 29%)4659(Top 193%)
20K12.43 mi3.11 mi4612-414332-264332-264856(Top 17%)4528(Top 28%)4528(Top 188%)
HALF13.11 mi0.68 mi4682-704395-634395-636153(Top 21%)5540(Top 34%)5540(Top 230%)
25K15.53 mi2.42 mi4790-1084488-934488-935842(Top 20%)5253(Top 32%)5253(Top 218%)
30K18.64 mi3.11 mi4915-1254574-864574-865903(Top 20%)5231(Top 32%)5231(Top 217%)
20M20.00 mi1.36 mi5017-1024646-724646-726364(Top 22%)5486(Top 34%)5486(Top 227%)
21M21.00 mi1.00 mi5078-614691-454691-456256(Top 22%)5293(Top 32%)5293(Top 219%)
35K21.75 mi0.75 mi5159-814747-564747-567676(Top 26%)6225(Top 38%)6225(Top 258%)
23M23.00 mi1.25 mi5473-3144971-2244971-2249955(Top 34%)7344(Top 45%)7344(Top 304%)
24M24.00 mi1.00 mi5681-2085119-1485119-1489667(Top 33%)7114(Top 44%)7114(Top 295%)
40K24.85 mi0.85 mi5976-2955345-2265345-22612397(Top 43%)8346(Top 51%)8346(Top 346%)
25.2M25.20 mi0.35 mi6108-1325439-945439-9413066(Top 45%)8574(Top 52%)8574(Top 355%)
FINISH26.22 mi1.02 mi6385-2775624-1855624-18515930(Top 55%)9950(Top 61%)9950(Top 412%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 17%
×21
+97ft-345ft

Overall

5001

Males

4659

M45-49

4659

5K→10K

3.1 - 6.2 mi

Top 16%
×5
+79ft-138ft

Overall

4759

Males

4466

M45-49

4466

10K→15K

6.2 - 9.3 mi

Top 17%
×3
+67ft-78ft

Overall

5001

Males

4659

M45-49

4659

15K→20K

9.3 - 12.4 mi

Top 17%
×5
+106ft-86ft

Overall

4856

Males

4528

M45-49

4528

20K→HALF

12.4 - 13.1 mi

Top 21%
×2
+19ft-37ft

Overall

6153

Males

5540

M45-49

5540

HALF→25K

13.1 - 15.5 mi

Top 20%
×4
+66ft-88ft

Overall

5842

Males

5253

M45-49

5253

25K→30K

15.5 - 18.6 mi

Top 20%
×9
+181ft-148ft

Overall

5903

Males

5231

M45-49

5231

30K→20M

18.6 - 20.0 mi

Top 22%
×5
+64ft-50ft

Overall

6364

Males

5486

M45-49

5486

20M→21M

20.0 - 21.0 mi

Top 22%
×8
+106ft-24ft

Overall

6256

Males

5293

M45-49

5293

21M→35K

21.0 - 21.8 mi

Top 26%
×7
+17ft-86ft

Overall

7676

Males

6225

M45-49

6225

35K→23M

21.8 - 23.0 mi

Top 34%
×5
+23ft-63ft

Overall

9955

Males

7344

M45-49

7344

23M→24M

23.0 - 24.0 mi

Top 33%
×6
+12ft-82ft

Overall

9667

Males

7114

M45-49

7114

24M→40K

24.0 - 24.9 mi

Top 43%
×1
+6ft-20ft

Overall

12397

Males

8346

M45-49

8346

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1
+13ft-16ft

Overall

13066

Males

8574

M45-49

8574

25.2M→FINISH

25.2 - 26.2 mi

Top 55%
×2
+22ft-21ft

Overall

15930

Males

9950

M45-49

9950

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
498
Passed By
2235
Net Change
-2415
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3970
5K → 10K51200-362#3970#4332
10K → 15K49200-239#4332#4571
15K → 20K82123-41#4571#4612
20K → HALF878-70#4612#4682
HALF → 25K45153-108#4682#4790
25K → 30K82200-125#4790#4915
30K → 20M29131-102#4915#5017
20M → 21M46107-61#5017#5078
21M → 35K26107-81#5078#5159
35K → 23M20200-314#5159#5473
23M → 24M28200-208#5473#5681
24M → 40K20200-295#5681#5976
40K → 25.2M4136-132#5976#6108
25.2M → FINISH8200-277#6108#6385
TOTALS4982235-2415
📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Activity Data

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing