Boston Marathon logo
BOSTON MARATHON 2023

Daniel Isakson

Bib: 20683•M

CT

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Male)
#0 / 15176
Masters (Masters Men)
#0 / 9891
Division (M60-64)
#0 / 1110
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
26:23
Rank: #17500
Start → 5K
26:23 | 8:30/mi
10K· 6.21 mi
52:35
Rank: #17657 (-157)
5K → 10K
26:12 | 8:26/mi
15K· 9.32 mi
1:20:23
Rank: #18610 (-953)
10K → 15K
27:48 | 8:57/mi
20K· 12.43 mi
1:48:40
Rank: #19035 (-425)
15K → 20K
28:17 | 9:06/mi
Half· 13.11 mi
1:55:06
Rank: #19222 (-187)
20K → Half
6:26 | 9:26/mi
25K· 15.53 mi
2:18:19
Rank: #19640 (-418)
Half → 25K
23:13 | 9:35/mi
30K· 18.64 mi
2:50:24
Rank: #20239 (-599)
25K → 30K
32:05 | 10:20/mi
20M
3:04:39
Rank: #20373 (-134)
30K → 20M
14:15 | 10:29/mi
21M
3:16:42
Rank: #20566 (-193)
20M → 21M
12:03 | 12:03/mi
35K· 21.75 mi
3:24:10
Rank: #20594 (-28)
21M → 35K
7:28 | 9:59/mi
23M
3:37:39
Rank: #20678 (-84)
35K → 23M
13:29 | 10:46/mi
24M
3:48:16
Rank: #20759 (-81)
23M → 24M
10:37 | 10:37/mi
40K· 24.85 mi
3:57:23
Rank: #20798 (-39)
24M → 40K
9:07 | 10:40/mi
25.2M
4:01:34
Rank: #20828 (-30)
40K → 25.2M
4:11 | 12:08/mi
Finish· 26.22 mi
4:12:31
Rank: #20956 (-128)
25.2M → Finish
10:57 | 10:45/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
Time1:55:06
Pace8:47 /mi
2nd Half
Distance13.11 mi
Time2:17:25
Pace10:29 /mi
📊Positive Split: 19.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:19:2626:238:3026:23
8:30
-
10K
6.21 mi11:45:3852:358:2826:12
8:26
-0:04
15K
9.32 mi12:13:261:20:238:3727:48
8:57
+0:31
20K
12.43 mi12:41:431:48:408:4528:17
9:06
+0:09
Half
13.11 mi12:48:091:55:068:476:26
9:26
+0:20
25K
15.53 mi13:11:222:18:198:5423:13
9:35
+0:09
30K
18.64 mi13:43:272:50:249:0832:05
10:20
+0:45
20M
20.00 mi13:57:423:04:399:1414:15
10:29
+0:09
21M
21.00 mi14:09:453:16:429:2212:03
12:03
+1:34
35K
21.75 mi14:17:133:24:109:237:28
9:59
-2:04
23M
23.00 mi14:30:423:37:399:2813:29
10:46
+0:47
24M
24.00 mi14:41:193:48:169:3110:37
10:37
-0:09
40K
24.85 mi14:50:263:57:239:339:07
10:40
+0:03
25.2M
25.20 mi14:54:374:01:349:354:11
12:08
+1:28
Finish
26.22 mi15:05:344:12:319:3810:57
10:45
-1:23

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

8:26 /mi

Average Pace

9:38 /mi

Slowest Pace

12:08 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:19

55% of race

Time at Steady Pace

1:37:58

39% of race

Time at Slower Pace

16:14

6% of race

Average Pace: 9:38 /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 mi11:19:2626:238:3026:23
8:30
#17500
10K
6.21 mi11:45:3852:358:2826:12
8:26
#17657
15K
9.32 mi12:13:261:20:238:3727:48
8:57
#18610
20K
12.43 mi12:41:431:48:408:4528:17
9:06
#19035
Half
13.11 mi12:48:091:55:068:476:26
9:26
#19222
25K
15.53 mi13:11:222:18:198:5423:13
9:35
#19640
30K
18.64 mi13:43:272:50:249:0832:05
10:20
#20239
20M
20.00 mi13:57:423:04:399:1414:15
10:29
#20373
21M
21.00 mi14:09:453:16:429:2212:03
12:03
#20566
35K
21.75 mi14:17:133:24:109:237:28
9:59
#20594
23M
23.00 mi14:30:423:37:399:2813:29
10:46
#20678
24M
24.00 mi14:41:193:48:169:3110:37
10:37
#20759
40K
24.85 mi14:50:263:57:239:339:07
10:40
#20798
25.2M
25.20 mi14:54:374:01:349:354:11
12:08
#20828
Finish
26.22 mi15:05:344:12:319:3810:57
10:45
#20956
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM60-64Seg. OverallSeg. MalesSeg. M60-64
5K3.11 mi3.11 mi17500112311123120253(Top 76%)12422(Top 82%)12422(Top 1119%)
10K6.21 mi3.10 mi17657-15711320-8911320-8917809(Top 67%)11415(Top 75%)11415(Top 1028%)
15K9.32 mi3.11 mi18610-95311701-38111701-38120253(Top 76%)12422(Top 82%)12422(Top 1119%)
20K12.43 mi3.11 mi19035-42511874-17311874-17320154(Top 76%)12383(Top 82%)12383(Top 1116%)
Half13.11 mi0.68 mi19222-18711951-7711951-7721880(Top 82%)13132(Top 87%)13132(Top 1183%)
25K15.53 mi2.42 mi19640-41812111-16012111-16021070(Top 79%)12743(Top 84%)12743(Top 1148%)
30K18.64 mi3.11 mi20239-59912354-24312354-24321834(Top 82%)13004(Top 86%)13004(Top 1172%)
20M20.00 mi1.36 mi20373-13412403-4912403-4921695(Top 81%)12867(Top 85%)12867(Top 1159%)
21M21.00 mi1.00 mi20566-19312479-7612479-7622821(Top 86%)13346(Top 88%)13346(Top 1202%)
35K21.75 mi0.75 mi20594-2812485-612485-621192(Top 80%)12574(Top 83%)12574(Top 1133%)
23M23.00 mi1.25 mi20678-8412503-1812503-1821903(Top 82%)12861(Top 85%)12861(Top 1159%)
24M24.00 mi1.00 mi20759-8112528-2512528-2522254(Top 84%)12990(Top 86%)12990(Top 1170%)
40K24.85 mi0.85 mi20798-3912540-1212540-1221614(Top 81%)12644(Top 83%)12644(Top 1139%)
25.2M25.20 mi0.35 mi20828-3012544-412544-422707(Top 85%)13178(Top 87%)13178(Top 1187%)
Finish26.22 mi1.02 mi20956-12812591-4712591-4723476(Top 88%)13559(Top 89%)13559(Top 1222%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21stories
+97ft-345ft

Overall

20253

Males

12422

M60-64

12422

5K→10K

3.1 - 6.2 mi

Top 67%
×5stories
+79ft-138ft

Overall

17809

Males

11415

M60-64

11415

10K→15K

6.2 - 9.3 mi

Top 76%
×3stories
+67ft-78ft

Overall

20253

Males

12422

M60-64

12422

15K→20K

9.3 - 12.4 mi

Top 76%
×5stories
+106ft-86ft

Overall

20154

Males

12383

M60-64

12383

20K→Half

12.4 - 13.1 mi

Top 82%
×2stories
+19ft-37ft

Overall

21880

Males

13132

M60-64

13132

Half→25K

13.1 - 15.5 mi

Top 79%
×4stories
+66ft-88ft

Overall

21070

Males

12743

M60-64

12743

25K→30K

15.5 - 18.6 mi

Top 82%
×9stories
+181ft-148ft

Overall

21834

Males

13004

M60-64

13004

30K→20M

18.6 - 20.0 mi

Top 81%
×5stories
+64ft-50ft

Overall

21695

Males

12867

M60-64

12867

20M→21M

20.0 - 21.0 mi

Top 86%
×8stories
+106ft-24ft

Overall

22821

Males

13346

M60-64

13346

21M→35K

21.0 - 21.8 mi

Top 80%
×7stories
+17ft-86ft

Overall

21192

Males

12574

M60-64

12574

35K→23M

21.8 - 23.0 mi

Top 82%
×5stories
+23ft-63ft

Overall

21903

Males

12861

M60-64

12861

23M→24M

23.0 - 24.0 mi

Top 84%
×6stories
+12ft-82ft

Overall

22254

Males

12990

M60-64

12990

24M→40K

24.0 - 24.9 mi

Top 81%
×1story
+6ft-20ft

Overall

21614

Males

12644

M60-64

12644

40K→25.2M

24.9 - 25.2 mi

Top 85%
×1story
+13ft-16ft

Overall

22707

Males

13178

M60-64

13178

25.2M→Finish

25.2 - 26.2 mi

Top 88%
×2stories
+22ft-21ft

Overall

23476

Males

13559

M60-64

13559

Passing Analysis

Category:
Athletes Passed
608
Passed By
4064
Net Change
-3456
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17500
5K → 10K230387-157#17500#17657
10K → 15K23976-953#17657#18610
15K → 20K59484-425#18610#19035
20K → Half1188-187#19035#19222
Half → 25K34452-418#19222#19640
25K → 30K44643-599#19640#20239
30K → 20M42176-134#20239#20373
20M → 21M23216-193#20373#20566
21M → 35K3765-28#20566#20594
35K → 23M46130-84#20594#20678
23M → 24M21102-81#20678#20759
24M → 40K2160-39#20759#20798
40K → 25.2M838-30#20798#20828
25.2M → Finish19147-128#20828#20956
TOTALS6084064-3456
📊

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